Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b9860559b6c56f…

MALICIOUS

PDF

51.8 KB Created: 2020-07-31 17:37:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d13c5e100e24a01ff1d684bf794d531b SHA-1: e7883d96e951606b5fc411b393396678dedaa0df SHA-256: 18b9860559b6c56f2ff8a162e3ee25d477f2b76f78881f0193187ebb42768bb3
194 Risk Score

Malware Insights

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

The PDF contains multiple links to redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=twitter+hashtag+search`, which is flagged as malicious. The document also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.cc/pify?keyword=twitter+hashtag+search In PDF document text
    • http://files.rideguide45.com/uploads/1/3/0/7/130739962/0ad7b5500d51.pdfIn PDF document text
    • http://files.geopr.org/uploads/1/3/1/3/131381799/7961937.pdfIn PDF document text
    • http://files.philshomecenter.com/uploads/1/3/1/4/131483955/3171105.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/1/0433/0687/7080/files/bagubiginapir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6720/9893/files/xisetowupomisisawasolab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9405/6861/files/mupadumabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1617/5263/files/mosazobewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/37974879126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0723/7531/files/21871034799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/49793457750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/99785254082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/72927986031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/87835712488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5177/7185/files/xupevizivaturofez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9693/2501/files/53532082785.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC4 5068 bytes
SHA-256: de4182080a357e97b8bb2478e9f816d4fc7b58a5c5c78d065378153a9802ec64
font_01_sfnt_off00009e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E10 10588 bytes
SHA-256: ec8020a51777d656c286968191923298d855d8a7a01209d010f1d00b0a0e3b73

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