Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c60d1465054216e…

MALICIOUS

PDF

45.5 KB Created: 2020-09-01 00:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d019d2dcf95dc5606b590f3879d0062c SHA-1: 102a4e775bf713d95d110478710fcab5501d6bec SHA-256: 7c60d1465054216eb85732c43cfd7f41bd132f6aac66569243f30868db25e9b7
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to known malicious redirector infrastructure at `ttraff.ru`. The document body, though heavily obfuscated, contains keywords related to a movie and the authoring application, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious.

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/wix?keyword=saaho+movie+bad+boy+video+song
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/zudutejerajaximutafaxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/megokasu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/numubegipa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/ropegasugubawimu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9513/0266/files/55915243236.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_5defb0bb5638498ab62059f936b48010.pdf
    • https://static.usrfiles.com/ugd/07e02c_5787223095684988b714c39089a0928b.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbfa3c28af6d4c6399c218417f30d338.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cdb85e260694944968d6c7e18b42741.pdf
    • https://cdn.shopify.com/s/files/1/0431/3818/7413/files/90399833925.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/business_writing_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/6553/0785/files/40367696262.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5680/files/tovepudikud.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7055/files/mokivozun.pdf
    • https://cdn.shopify.com/s/files/1/0437/3420/4568/files/wadofazefiveliwutasuni.pdf
    • https://cdn.shopify.com/s/files/1/0432/9930/7678/files/nosatenokuxisuropokarisa.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a7a.bin
786703313eb20567cbfeea1f542c4da866dbd7ad27ef51e9d0bd97861228aa94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7A 5224 bytes
font_01_sfnt_off00006c0e.bin
9a058100a7e3d82106266f932705c8940e01e283d99acc7f4f1e91f6f293898f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0E 3072 bytes
font_02_sfnt_off00007870.bin
12bd7a95faad1a565f802dca817f4abf02c425dac022d7baa8ae60bf25d82dc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7870 10000 bytes
font_03_sfnt_off00009a74.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A74 4324 bytes

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