Malicious PDF — malware analysis report

Static analysis result for SHA-256 09be5984b7e00c87…

MALICIOUS

PDF

55.5 KB Created: 2020-08-01 14:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb80b0d7e81c9f1253024ccc21b420de SHA-1: c6db07d385a199756fc5e74239eb3d8c2cb1d0fb SHA-256: 09be5984b7e00c8704cc079200c24cf7730b2c8d3c501c7a88fdde8b506fa4d5
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=1-+99+farming+guide+osrs'. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of embedded URLs and the redirector link strongly suggest an attempt to lead the user 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.com/pify?keyword=1-+99+farming+guide+osrs
    • http://files.donnamoralesactress.com/uploads/1/3/2/6/132680855/240168.pdf
    • http://files.rockwoodtennis.com/uploads/1/3/1/4/131437765/7374050.pdf
    • http://files.iamyandea.com/uploads/1/3/1/6/131606133/tikiwivigezaj.pdf
    • http://files.youmakethedifference.net/uploads/1/3/2/3/132303316/1998784.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/5513/5390/files/9720603427.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/xabepajaragex.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6486/files/97182862067.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5324/files/zefagezorirusozo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9647/files/download_legend_drake.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/79490897245.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/jolok.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6063/files/satonebama.pdf
    • https://cdn.shopify.com/s/files/1/0432/0254/3778/files/dubudunuximipijijonalo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1419/2284/files/difijudine.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/deretojawi.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_off00009b48.bin
fca2c4fa201f14ffc852f7d20d80ebbf8f3a8e36904d854902bfedcdfcfd7d2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B48 5340 bytes
font_01_sfnt_off0000ad6b.bin
dd3ed4951c7720f4c8721ad7c4d80f96a79bfd0be5be759f0c545aa29cd8a3f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD6B 10508 bytes