Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af441f9dfc25b2c…

MALICIOUS

PDF

41.8 KB Created: 2020-08-22 00:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9fdd648994d42505ca47ef79568b575 SHA-1: 00f170ede3ddb2a1f408a9d1034de108af2814d7 SHA-256: 6af441f9dfc25b2cbf69b4ce8c8f2f46c535feb3aa5e1b4b2bb279c09b6b46c6
202 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'ios 12.2 whatsapp for android' and includes the malicious URL, suggesting a lure to trick users into clicking. The presence of MFA lure heuristics further supports a credential harvesting or session hijacking attempt.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=ios+12.+2+whatsapp+for+android
    • http://fetixilus.embodylifeyoga.com/uploads/1/3/0/9/130969690/b898176f5b8.pdf
    • http://files.myflicktv.com/uploads/1/3/1/4/131454521/7f20b78004c5.pdf
    • http://files.dsmgraphics.com/uploads/1/3/1/0/131070799/44da23c72265be.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6845/7113/files/ximokapitegaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/bandit_algorithms_for_website_optimization_developing_deploying_and_debugging.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/kezaroveji.pdf
    • https://cdn.shopify.com/s/files/1/0462/7949/1733/files/contemplate_on_something.pdf
    • https://cdn.shopify.com/s/files/1/0431/6610/5759/files/colours_worcester_ma.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7644/files/28254171449.pdf
    • https://cdn.shopify.com/s/files/1/0437/1575/6181/files/45_country_code.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/bawazup.pdf
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/xixuvavukipuzas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/8984461567.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000649c.bin
32e9b2aa3539f1b102d50dcff5c58cf2f4e1f3c1ea4f24fe7fe5a62bb87db940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x649C 5340 bytes
font_01_sfnt_off000076d9.bin
5239cf365b486e3967d91e58ca9d561dbbbad116c2987fa942eccd026886b658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D9 10764 bytes

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