Malicious PDF — malware analysis report

Static analysis result for SHA-256 4897e36354b926fb…

MALICIOUS

PDF

46.5 KB Created: 2020-08-03 12:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 003e64122f0c05285c319f3387d23cc7 SHA-1: b432003ca4bfa59dd68076bc8e1d94ec16e661ac SHA-256: 4897e36354b926fbc8e8156a1440b66eb1518df0de715366100832920acd701a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a critical heuristic for containing a malicious redirector link. Additionally, it was identified as a PDF SEO link farm, suggesting an attempt to distribute numerous links. The primary malicious IOC is the redirector URL, which is likely used to funnel users to a malicious destination. No scripts were extracted, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=concrete+repair+materials+pdf
    • http://files.trevorberensmusic.com/uploads/1/3/0/8/130874655/benifopepuzaxo.pdf
    • http://files.brittanynalangan.com/uploads/1/3/1/3/131383604/minalafidadup.pdf
    • http://files.islshenzhen.com/uploads/1/3/0/7/130740530/ruzuxiwenur.pdf
    • http://files.athan.com/uploads/1/3/0/8/130814169/tesor_gaviwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/8453/0343/files/ay_papi_16.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90278046640.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/30529647499.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2255/files/60482624217.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/pefenozidagovopizukas.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/43577778750.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/jeruxanewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/30788592392.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/tejuwavalajogusim.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3307/files/26112643543.pdf
    • https://cdn.shopify.com/s/files/1/0435/4847/5541/files/binotizonimurizuvumuso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/soreluseloxajakikolo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/25387984790.pdf
    • https://cdn.shopify.com/s/files/1/0428/1624/1831/files/nikon_d50_manual.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b43.bin
a0ba38b749898a645dfcf8a745f447d90717ff9329e96897b8826b57f73f5f10
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B43 5112 bytes
font_01_sfnt_off00007c7e.bin
15b9a86fab9f5482d78b23c2d0bec8bfee20618070e2a481767d62c2cfb73241
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7E 9964 bytes
font_02_sfnt_off00009e8d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E8D 4324 bytes