Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e19eea406eac574…

MALICIOUS

PDF

45.9 KB Created: 2020-08-06 08:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f00c704d099b8196219d6aad45539a0 SHA-1: 0b9bb5f644780f0bc1bc37717dc1a8ef4874dd5f SHA-256: 5e19eea406eac5740ec3f6d6c2b9928b49d7dab7a0056ac46f71cd149b74dfe5
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector, disguised as a furniture catalogue. The ML classifier strongly indicated maliciousness, and the presence of multiple external links suggests a link farm or redirection scheme to a malicious site. The document body itself is heavily obfuscated and contains the malicious redirector URL.

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=bedroom+furniture+design+catalogue+pdf
    • http://files.murdockcounseling.com/uploads/1/3/1/1/131164081/nukokujo-visumal-bibepigon-zuvanufugidak.pdf
    • http://files.linetweaker.com/uploads/1/3/1/8/131872079/adf7a26.pdf
    • http://files.sarahrosepeterson.net/uploads/1/3/2/6/132695493/1386074.pdf
    • http://files.highwayhomestead.org/uploads/1/3/0/8/130873849/giponosigawoto_morimal_kefivud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4245/5195/files/wukevoparadujelamu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/zewofobimesed.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/wugepatijusupu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8048/1958/files/40258455885.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/84636596326.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/nitefawuwozotevawukoki.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/xivadajeguji.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/3717908468.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/66138295751.pdf
    • https://cdn.shopify.com/s/files/1/0431/2062/3765/files/clarkson_shipping_intelligence_weekly.pdf
    • https://cdn.shopify.com/s/files/1/0437/5658/5111/files/86263740899.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_off0000767a.bin
bd1bdc73aafaad86229b47ec563f541aeef827800d943b94e8ebbb0431017320
pdf-font-stream PDF embedded font (sfnt) at offset 0x767A 5524 bytes
font_01_sfnt_off00008935.bin
02613309d339363959f6a115248d9b8d868f8478a9060013a2a432f0fc65b8d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8935 9792 bytes