Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d1a3a7a87a3e38…

MALICIOUS

PDF

39.8 KB Created: 2020-08-03 07:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c5b576d939397c86f3e00941695eedf SHA-1: 0acc52d6586c3f71332e474587f286dd89ecce8f SHA-256: 15d1a3a7a87a3e385b13f5b09db65fdba28e76706a8b84589f8ae068e4178bbb
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a manual, likely a lure for SEO poisoning or phishing. The ML classifier strongly indicates maliciousness, and the presence of external links supports a pattern of redirecting users to potentially harmful content.

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=trane+xe80+furnace+manual+pdf
    • http://files.goodwinbiotechnology.com/uploads/1/3/1/0/131069789/mevenobomolirokeb.pdf
    • http://files.pecsaa.com/uploads/1/3/1/3/131384436/1095161.pdf
    • http://files.solomomma.com/uploads/1/3/0/8/130874010/8ad947d8253d3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/59005296654.pdf
    • https://cdn.shopify.com/s/files/1/0431/0027/4845/files/99143157795.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73807437975.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/djvu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/39551068854.pdf
    • https://cdn.shopify.com/s/files/1/0438/2018/7805/files/ranixafedaxunane.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/92302979367.pdf
    • https://cdn.shopify.com/s/files/1/0434/2684/0737/files/zilukowewiwidanir.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/70346067019.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8007882555.pdf
    • https://cdn.shopify.com/s/files/1/0435/4270/8378/files/marketing_management_14th_edition.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_off00005f1f.bin
13c79119569cf8d48754c9ab968d1157e05f47ff0a968e5d55e48e2137a797a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1F 5476 bytes
font_01_sfnt_off000071aa.bin
99db4db6cc3a5360c4d7cb252ae3464d6f8a57669cfb278924c26e6e27dd7715
pdf-font-stream PDF embedded font (sfnt) at offset 0x71AA 9632 bytes