Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f86dabe67dd1308…

MALICIOUS

PDF

51.2 KB Created: 2020-07-21 02:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 1de12b5fcf4a2e484d3c79ed8aebc31f SHA-1: ce37083321d3a62d29639e8a356d0549fc3aab17 SHA-256: 7f86dabe67dd130822fd1f283fee9832eebfcaeee99c72567a53ded297d29628
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to SEO-optimized PDF files, suggesting an attempt to generate traffic or distribute content. One prominent link redirects through 'ttraff.com', a known malicious redirector, to a page related to 'Directv choice package channel lineup pdf'. This indicates a likely phishing or scam lure, leveraging a seemingly legitimate document to trick users into visiting a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wb?keyword=directv%20choice%20package%20channel%20lineup%20pdf In PDF document text
    • http://files.kirkbeeler.com/uploads/1/3/1/3/131381706/zevalisigo.pdfIn PDF document text
    • http://files.carsontidwell.com/uploads/1/3/1/4/131438249/mumiv.pdfIn PDF document text
    • http://files.gehan-lab.org/uploads/1/3/1/8/131872017/1464074.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37357510366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/viwibigixebimigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7514/9719/files/pinokumipevogokos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/8325170575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4160/2198/files/71452470999.pdfIn PDF document text
    • https://valolil.files.wordpress.com/2020/06/revoxorore.pdfIn PDF document text
    • https://rugemafo.files.wordpress.com/2020/07/64972321233.pdfIn PDF document text
    • https://binixuved.files.wordpress.com/2020/07/rufutelevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sexewagufik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7270/1095/files/tomaravemazinawopijeviri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7111/0308/files/xavodufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/36803161695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3427/1126/files/31674178568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/80625601339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/tevanujofixosobijopafur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/41439733483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/79690395837.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB6 5244 bytes
SHA-256: 2b9625b8957f5580576fd3ee2827e50df34907ca606921e92830d87d264982ed
font_01_sfnt_off00008f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F8A 14940 bytes
SHA-256: ae4cbc2ef355e10c0ea0d4b0e84f7311e22b80cfd1712ea3bc013ae3777d58d9