Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb83272b650b3d38…

MALICIOUS

PDF

48.1 KB Created: 2020-07-23 17:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 50dadaef614307c90bdb8f2ead6f1962 SHA-1: e1927801bf964cb6142f0018c97e7ce78ff84cff SHA-256: bb83272b650b3d38c82cba2a6e437bb2b05749806525ae6f77a78d5f6a120928
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link pointing to ttraff.ru, which is flagged as malicious. Additionally, it exhibits characteristics of a link farm, with numerous external PDF links, many hosted on cdn.shopify.com. The presence of a 'Download' button lure further supports a malicious intent to redirect users to potentially harmful content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/wb?keyword=social%20media%20trends%202020%20pdf In PDF document text
    • http://files.longocreative.com/uploads/1/3/2/8/132814337/0e8b3741.pdfIn PDF document text
    • http://files.diamondpta.com/uploads/1/3/0/7/130739986/657d5ade9983.pdfIn PDF document text
    • http://files.dangshades.com/uploads/1/3/2/7/132740525/9664484.pdfIn PDF document text
    • http://files.edwardvisualart.com/uploads/1/3/2/6/132695732/gosojajakizap_rekigunukug.pdfIn PDF document text
    • http://files.ericeklecoaching.com/uploads/1/3/2/6/132695418/1055071.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/1/0433/2729/1544/files/76411264677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/kopofoxapusibalozufin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fonufefijosogigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/72309047559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1078/3394/files/61281072713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/molujivesal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76685421079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3700/7778/files/zolimefegomovis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/33735718285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9963/4326/files/73182680555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5945/3860/files/wuxidefival.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/medojujamazut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/wepomebox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8774/9529/files/32911439947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/65662863018.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_off00007e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2A 5464 bytes
SHA-256: 6b918ad5e701eefeaf89e65f1829c1b0386feefccc9f6edbeb02ed94b7d91ab3
font_01_sfnt_off00009090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9090 10192 bytes
SHA-256: 28aa6f69bf7d0c5c80918dee073fcc5a346219d07872794338526c56ac040f30