Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba2e57775d6a660…

MALICIOUS

PDF

40.4 KB Created: 2020-08-11 00:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8438cddf16199d687927ef0657d7d3ea SHA-1: ecd8e3632b42e7c692b82fdc24da1ab8ada78b13 SHA-256: 6ba2e57775d6a660e83766c3513335f71bebefa505e84b68897bd212b4c080ac
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 potentially malicious redirectors or link farms, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a URL that appears to be part of the link farm, suggesting the primary purpose is to drive traffic to malicious infrastructure.

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=acute+pancreatitis+in+pregnancy+pdf
    • http://files.fixfaithsfemur.com/uploads/1/3/1/8/131871583/56a04c0377eb88.pdf
    • http://sigegobe.romanticism55.com/uploads/1/3/1/6/131606490/8461282.pdf
    • http://pozesax.ifcl.com/uploads/1/3/1/8/131857631/komolonika-zavipavejuva-saxuvavudowet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/zuronofu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/poxukagez.pdf
    • https://cdn.shopify.com/s/files/1/0433/8214/5182/files/lulirimar.pdf
    • https://cdn.shopify.com/s/files/1/0436/9511/2347/files/safefujovaxebenobo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/57755423053.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/45268701656.pdf
    • https://cdn.shopify.com/s/files/1/0447/4201/7173/files/tufadixisaloguzifalerot.pdf
    • https://cdn.shopify.com/s/files/1/0429/3761/4499/files/pewibugodirukarolojoline.pdf
    • https://cdn.shopify.com/s/files/1/0434/4414/2245/files/risurufufunukokudasupe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6293/files/parakegogoga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/cours_d_orthographe_ce1.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/temetafepopo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/kalakoka.pdf
    • https://cdn.shopify.com/s/files/1/0434/5508/6742/files/ramefuzamonala.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_off00006017.bin
b0b9c0d9bf56d2a52b5cc5692035717d583a89ff686da8c64baf33e2e8ed6806		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6017 5380 bytes
font_01_sfnt_off0000727c.bin
dcf247c9803c8bc3496db1aa5118762cd47701af1c34b6cfe93e8473b395230a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x727C 9948 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.