Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab1eb9609c0ac94…

MALICIOUS

PDF

41.1 KB Created: 2020-07-12 04:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12247409ea89b5ea8e64b2b8f27abede SHA-1: 0bbf28b194ab834cc8c23163ea2da8ef8084d214 SHA-256: 5ab1eb9609c0ac94ae923c044cb9aa591a099a671f4f3981f82de0923e7b054f
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The embedded URL 'https://ttraff.ru/pify?keyword=dr+seuss+audio+books+free' is a known malicious redirector, likely leading to further malicious content or a phishing page. The document body, though heavily obfuscated, contains references to the malicious URL and appears to be a lure for free audio books.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=dr+seuss+audio+books+free
    • http://files.graffitiwgratitude.com/uploads/1/3/0/7/130738814/808e7b1556b9ad.pdf
    • http://files.moderngoddessliving.com/uploads/1/3/1/3/131384279/c292ffbfc1e548c.pdf
    • http://files.davezinncreative.com/uploads/1/3/0/7/130775979/vitupapeziwa.pdf
    • http://files.mccannpetgroup.com/uploads/1/3/1/3/131384254/sefozumevigodu_gavowi_litovewur_vozat.pdf
    • http://files.herbrainchild.com/uploads/1/3/2/6/132681293/79f7662812.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://jojoveda.files.wordpress.com/2020/06/logabuzunogudolozok.pdf
    • https://pabajifulis.files.wordpress.com/2020/06/19932995135.pdf
    • https://murulejam.files.wordpress.com/2020/06/2372926169.pdf
    • https://vajozix.files.wordpress.com/2020/06/lifusi.pdf
    • https://juruvedofe.files.wordpress.com/2020/06/39656218613.pdf
    • https://jexoxaluk.files.wordpress.com/2020/06/3203105797.pdf
    • https://zifumopof.files.wordpress.com/2020/06/78935461004.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/foliwujowevotafosapokobun.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/11987648716.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/86675744846.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/74097146491.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/runuwadobona.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84712881745.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/fojemiwasopebisodevi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/20063894887.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_off0000642d.bin
09825c7b5834c057b0af7673c4ef596855fd530a1785b2b69315806fbd3f4a42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642D 4768 bytes
font_01_sfnt_off00007471.bin
caabd7484d2f2a7f9fd65fa21ba04ac40787074265a7a0bc245508191a6a7ed1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7471 10244 bytes

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