Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d5711e7729a445…

MALICIOUS

PDF

41.8 KB Created: 2020-08-02 14:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70c0914c0c4f38141553224f7cb4da43 SHA-1: 0706bb8fe80e15ef15a21392aee87574ffd6c574 SHA-256: 68d5711e7729a44559202b965d0c68110c069485807c5e8b32007026eb338f81
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, suggesting it's a primary lure. The presence of numerous other PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to disguise the malicious redirector. The heuristic 'SE_MFA_LURE' suggests the ultimate goal may be credential harvesting.

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.
  • 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
  • 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=whirlpool+duet+steam+washer+manual
    • http://files.ivanateahouse.ca/uploads/1/3/2/6/132680922/1474278.pdf
    • http://files.taiwancarparts.com/uploads/1/3/2/6/132695325/zenovosisulematoti.pdf
    • http://files.georgiewoodeventing.com/uploads/1/3/0/7/130775823/mejonaget.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9277/0977/files/fundamentals_of_matrix_computations.pdf
    • https://cdn.shopify.com/s/files/1/0438/2916/6242/files/earth_science_mcdougal_littell.pdf
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/58919593284.pdf
    • https://cdn.shopify.com/s/files/1/0433/5386/6408/files/favafugojisefugepujusele.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bijuwosozawubuvenokuzi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/10970108534.pdf
    • https://cdn.shopify.com/s/files/1/0434/4669/8146/files/30756079674.pdf
    • https://cdn.shopify.com/s/files/1/0428/3547/6636/files/duck_life_evolution.pdf
    • https://cdn.shopify.com/s/files/1/0435/0397/6614/files/videfakenigepomunizaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/78944497452.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/dimarotovelukopijisopex.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_off0000658a.bin
5d4cbda5aa02ca659de5cc24d88c2fdae74354937c1f9bfb5eafcdeedb6d651c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658A 5304 bytes
font_01_sfnt_off00007778.bin
2c4b9fd2204dbdc1154a9f18eb92c1d298693f217a076a85fd6a67fcc688575b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7778 10160 bytes

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