Malicious PDF — malware analysis report

Static analysis result for SHA-256 606869ba07079085…

MALICIOUS

PDF

33.7 KB Created: 2020-08-05 18:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8aae40f296178fec21c8797ed95f9947 SHA-1: a8b831aac6a4ac976cab1093ce336c73bd04e16e SHA-256: 606869ba07079085e79b6d4d392cc8716426721e994db15a6d33f371c70af915
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=2020+calendar+marathi+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the same URL and other Shopify-hosted PDF files, suggesting a link farm or SEO poisoning tactic to lure users. No scripts were extracted, but the presence of numerous links indicates an attempt to redirect users to malicious content.

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=2020+calendar+marathi+pdf
    • http://files.kspaceonline.com/uploads/1/3/1/3/131380868/b7e90.pdf
    • http://files.cajuncorral.com/uploads/1/3/1/4/131437595/rulorubeveruf.pdf
    • http://files.flocrowcroft.co.uk/uploads/1/3/1/8/131856446/xurapega.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5930/4858/files/73305061729.pdf
    • https://cdn.shopify.com/s/files/1/0433/4898/3959/files/xanekobalifomudagut.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6727/files/wozude.pdf
    • https://cdn.shopify.com/s/files/1/0431/6810/4610/files/disaketaxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/lovikagupoferepuzo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6701/3280/files/hold_to_crouch_fortnite.pdf
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/industrialcraft_2_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/78841590787.pdf
    • https://cdn.shopify.com/s/files/1/0438/4315/8166/files/62531821163.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7048/files/78421240382.pdf
    • https://cdn.shopify.com/s/files/1/0433/5039/2984/files/subopaxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8813/3787/files/number_pattern_solver.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_off0000488a.bin
6e5e67b74a92f0ab02c10c1361cb5babf128aecde7bd8fc7ee847436a7a3b4ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x488A 5396 bytes
font_01_sfnt_off00005ab2.bin
dcbe35cb9f2b748141f97f3f2111a9afc004ec4883be51053846240f24b0d308		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB2 9192 bytes

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