Malicious PDF — malware analysis report

Static analysis result for SHA-256 71034477574e239d…

MALICIOUS

PDF

39.4 KB Created: 2020-08-14 14:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 111b6e9c0809ba775b0483ecfeeda690 SHA-1: f18f2746c2714c4a8ebf0bf3367c69ca17dc39ee SHA-256: 71034477574e239d9c787766c3a8bb1fd46b0361bd2fbac134da4188cfc6b3a3
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing or malware distribution. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious destination. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.cc/pify?keyword=advanced+rx+pa+form
    • http://files.uniquebyruth.com/uploads/1/3/1/4/131437750/9048b926025e.pdf
    • http://gufuroxej.animatedstep-by-steps.com/uploads/1/3/1/0/131069934/pexurozasat.pdf
    • http://files.chichestersecuredog.co.uk/uploads/1/3/1/3/131379939/gilonazakelajo_rofirexot_wimiwazusigi.pdf
    • http://files.marisol-saona.com/uploads/1/3/0/9/130969446/fc06dd444bf0c8.pdf
    • http://files.bohemiansagegallery.com/uploads/1/3/1/1/131164047/9db39e68051.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5695/4518/files/turejigosasisefanituduki.pdf
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/gogotebapori.pdf
    • https://cdn.shopify.com/s/files/1/0428/5906/9599/files/53675193848.pdf
    • https://cdn.shopify.com/s/files/1/0428/9665/4489/files/vopipovuf.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/stp_oil_filters.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/pillars_of_eternity_garodh_s_chorus.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/juxowagukuluxonabalunikuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1202/2691/files/kizulukixodiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/gadosiga.pdf
    • https://cdn.shopify.com/s/files/1/0431/6971/0242/files/the_brightest_stars_anna_todd.pdf
    • https://cdn.shopify.com/s/files/1/0428/7217/6799/files/sulul.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/arizona_beneficiary_deed_form.pdf
    • https://cdn.shopify.com/s/files/1/0438/4705/7568/files/cerebellar_infarction.pdf
    • https://cdn.shopify.com/s/files/1/0428/5743/1196/files/45568314372.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/12284605280.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_off00005c17.bin
9d9afe52ca53e2959662a581358a68c8cc0fc60443c5cba6d6e9643f5ddd145c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C17 5208 bytes
font_01_sfnt_off00006dba.bin
f525f43bf63494286163b4ff42014895020ae685828b8e069fbdf2d3bc16fca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBA 10340 bytes

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