Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c155e5fe51e82a…

MALICIOUS

PDF

48.1 KB Created: 2020-08-18 23:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51f36bcdec89da1e6c5632637214a1ee SHA-1: 843637d56c6e2d6af8157c390b9c2150441b8587 SHA-256: 09c155e5fe51e82aff05eab3e2e0fd04c1499da8dc4e62736e79bd02ab713445
162 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document also features a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL points towards a phishing or malware distribution scheme.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=android+republic+toram
    • http://files.zivadancer.com/uploads/1/3/0/8/130814393/8d8b5051bd8455.pdf
    • http://zolili.sharedservicesct.com/uploads/1/3/1/8/131855997/geporubufimoka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/rinewo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4641/files/85376098821.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdf
    • https://cdn.shopify.com/s/files/1/0438/5911/6182/files/panevazuxirawidulani.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/57068755133.pdf
    • https://cdn.shopify.com/s/files/1/0434/7196/2269/files/90764601581.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/63747451315.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/mva_practice_test_2016.pdf
    • https://cdn.shopify.com/s/files/1/0428/1958/4166/files/bepuxax.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b5b.bin
cb9072f881c1fe0ad8900bbcc5a20a23fabb306412f64e001cac76c2a9509f2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5B 2952 bytes
font_01_sfnt_off000065ea.bin
c6a0864ba0fd8802bc461554b3c932c23c5587dd30e36de28ff617fa39eba594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65EA 5172 bytes
font_02_sfnt_off00007756.bin
8c1601fd28e5839b909f221297f1a1c90b2d62efcd02c3b4454eb4058308e7ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7756 12124 bytes
font_03_sfnt_off00009e7a.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E7A 16092 bytes

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