Malicious PDF — malware analysis report

Static analysis result for SHA-256 69afb44e01b3277d…

MALICIOUS

PDF

47.8 KB Created: 2020-08-12 08:38:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ea2a67e6679bd645fad3108f8b187d1 SHA-1: 00df4209e431114d0ee1bbd407e3c55de005975d SHA-256: 69afb44e01b3277db62ebed3791f3d38ef9e52a49ebebea770d60c7696e06cc3
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The document body and embedded link structure suggest a link farm or SEO poisoning tactic to disguise the malicious intent. The ML classifier also strongly indicated maliciousness.

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=campesinos+de+los+andes+y+otros+escritos+antol%25C3%25B3gicos+pdf
    • http://files.graphictechgroup.com/uploads/1/3/0/7/130740066/3592396.pdf
    • http://files.friends.kanemiller.com/uploads/1/3/1/3/131380107/1372089.pdf
    • http://files.zalzabik.com/uploads/1/3/0/7/130740429/572bfba6b7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdf
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/catalogo_price_shoes_urbano_otoo_invierno_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/movamemutal.pdf
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/716648107.pdf
    • https://cdn.shopify.com/s/files/1/0433/8365/2506/files/suzumitigarirum.pdf
    • https://cdn.shopify.com/s/files/1/0432/2610/3971/files/gefadikuxumigumavisupopu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0475/5096/files/786597867.pdf
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/4202397107.pdf
    • https://cdn.shopify.com/s/files/1/0437/0202/6393/files/39021237701.pdf
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/57703508869.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068f6.bin
e6a5f1086d61ea48e7ad7f2287ff2130e47ffa26cc4455cbb05b1810cff086fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x68F6 5524 bytes
font_01_sfnt_off00007b72.bin
213aa433712fa743e606a74c11ac6d9aa4756b23b956fa5e3e6a967d76638d95
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B72 11524 bytes
font_02_sfnt_off0000a124.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA124 4324 bytes