Malicious PDF — malware analysis report

Static analysis result for SHA-256 030288e0db935b86…

MALICIOUS

PDF

53.2 KB Created: 2020-08-10 08:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbac804964bf73f2c772ade21d3b52cc SHA-1: 345398260e4bde81bde84c01546939498dcb8e85 SHA-256: 030288e0db935b86b03044c4c5301d9e14592dc20c555dbacfdb53ffc261b4db
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a malicious redirector. This suggests the document is designed as a link farm to distribute malicious content. 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.cc/pify?keyword=midnight+cowboy+pdf
    • http://kujada.artworksandabstracts.net/uploads/1/3/2/7/132710712/gefojawejeniw.pdf
    • http://files.cai-ohio.com/uploads/1/3/1/3/131381518/d4d72.pdf
    • http://files.thedailyencounter.org/uploads/1/3/1/1/131163561/3571158.pdf
    • http://files.emorymichael.com/uploads/1/3/0/9/130969572/kekemifusexutijumafi.pdf
    • http://files.evangelismseminar.org/uploads/1/3/0/7/130776573/1fe2003a226e2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/runuwadobona.pdf
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/56604835873.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1045/files/fobavapewejuliva.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/77518955657.pdf
    • https://cdn.shopify.com/s/files/1/0428/9524/5475/files/1643548452.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0119/files/james_stewart_calculus_8th_edition_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4134/files/zesikewokolobofapenuti.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/31581207837.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovaje.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/38844961512.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_off00007e7a.bin
09472de6f26b1a41d76404465febca866300baa7a87f308d451b0b78dd9567d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7A 5452 bytes
font_01_sfnt_off0000917d.bin
1a97cd0374335edc86c707eb61773427f5525455e5b1d6c693cf630cab549200
pdf-font-stream PDF embedded font (sfnt) at offset 0x917D 5240 bytes
font_02_sfnt_off0000a37b.bin
e5714b9d4a039988cf960b5609f02038bda7c47021e11c6e743556d5b16da90e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA37B 10628 bytes