Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0202257e11f492…

MALICIOUS

PDF

37.2 KB Created: 2020-07-11 09:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96511043a152a874aa9a84b57093b906 SHA-1: 9c3b8e59eb2edd2a63391d621761090438a6b6f3 SHA-256: 6c0202257e11f4923fe1a03d09deffb9f5f441de63a5646da4eddf37cab184e3
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body text, though heavily obfuscated, includes the same URL found in the heuristic firing, suggesting an attempt to trick users into clicking it. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic, likely to drive traffic to malicious sites.

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=statistical+methods+for+social+sciences+4th+edition+pdf
    • http://files.mthopesanctuary.org/uploads/1/3/0/7/130776001/2473866.pdf
    • http://files.kelliruttle.com/uploads/1/3/2/7/132710762/bubil.pdf
    • http://files.cmillns.com/uploads/1/3/0/7/130776514/wudawanafe.pdf
    • http://files.willowfree.ca/uploads/1/3/0/7/130740344/xiwodufa.pdf
    • http://files.get-hookedup.net/uploads/1/3/1/3/131379111/zefurewevipidudefi.pdf
    • http://files.holcombgc.com/uploads/1/3/0/8/130813557/bodopewedexigekopose.pdf
    • http://files.riversideanimalclinicmi.com/uploads/1/3/1/0/131070378/lufemukel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://vexekube.files.wordpress.com/2020/06/73583662900.pdf
    • https://nubiwudowuva456071019.files.wordpress.com/2020/06/86708895480.pdf
    • https://jetisoka.files.wordpress.com/2020/06/visumaginugak.pdf
    • https://bafegetut.files.wordpress.com/2020/07/3904932583.pdf
    • https://xuvugumodad.files.wordpress.com/2020/07/95687167982.pdf
    • https://xipewisevu.files.wordpress.com/2020/07/xuwifojusu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/52618795311.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/30733833285.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sagomowaroperovi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/lakokozusigujixotabor.pdf
    • https://cdn.shopify.com/s/files/1/0433/5242/4598/files/83432222489.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/68012473800.pdf
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/90879887676.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_off00005307.bin
44f7206988650636cc8d11157f709e7303fee5bb738f619b9d99cb24e1067cf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5307 5372 bytes
font_01_sfnt_off00006515.bin
739e7b14fc85b9ad244a713e902b7028b7fe5fa1a9c831165e87886fcbf0c6c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6515 10068 bytes

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