Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd4f05aeb2186aa…

MALICIOUS

PDF

51.2 KB Created: 2020-08-10 23:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69e16f36b28d9370dd91c5dea69f686a SHA-1: 3795feee98ee6db0446a2984c86ff7a2bde6cad3 SHA-256: 6fd4f05aeb2186aa48856d30c71071f73ae5d2b36804fabec9efbb3efc3921ad
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=american+phonetic+alphabet+pdf, suggesting a lure to a phishing or malware distribution site. The presence of many Shopify links, while some are benign, is characteristic of SEO link farm techniques used to disguise malicious intent.

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.com/pify?keyword=american+phonetic+alphabet+pdf
    • http://files.patrickhowe-postpersonalism.com/uploads/1/3/2/7/132740805/fajexufed-xejezavitato.pdf
    • http://files.iananthonycoleman.com/uploads/1/3/0/7/130776718/9342694.pdf
    • http://files.vchschool.org/uploads/1/3/2/8/132815882/7910712.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/history_of_benin_art.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/posthumanism_nayar.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0528/files/80761943288.pdf
    • https://cdn.shopify.com/s/files/1/0438/3558/8770/files/13326624025.pdf
    • https://cdn.shopify.com/s/files/1/0429/2493/3283/files/futiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/5112/2842/files/tirupofewololabawubironaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6939/files/35969551530.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/types_of_blotting_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0434/7779/4982/files/22502386248.pdf
    • https://cdn.shopify.com/s/files/1/0431/3707/3314/files/joloduboga.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/mva_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12410546401.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_off00007606.bin
4840cba74d1b7881951026e44378e26c2b9a6929dd056ff0e80b77bf866e22d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7606 5348 bytes
font_01_sfnt_off000087f3.bin
d60c780fcf7edc37e2fb131dd356426e89e7c46edd57385c594765dba493c36b
pdf-font-stream PDF embedded font (sfnt) at offset 0x87F3 17508 bytes