Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a6fbe16fc0c204…

MALICIOUS

PDF

35.9 KB Created: 2020-08-28 16:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1318dff72b8c51d1f7b379f77a3579a4 SHA-1: ac9ee8e05e7fdfe22e937289e6ce5aedb65593b0 SHA-256: 26a6fbe16fc0c2046ca80492a614ce8c30dc2158ac250c635902b2cd0b9d218d
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector infrastructure at 'ttraff.me'. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the intent is to drive traffic to this redirector, likely as part of a phishing or scam campaign. The ML classifier strongly supports the malicious nature of this PDF.

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.me/pify?keyword=professor+messer+comptia+a
    • http://nefoxufoj.detaillocksmiths.com.au/uploads/1/3/0/7/130740080/7338604.pdf
    • http://files.ikesbagelcafe.net/uploads/1/3/2/7/132740285/4070652.pdf
    • http://votufin.gblsportsgroup.com/uploads/1/3/2/6/132681399/730956.pdf
    • http://files.missgojo.com/uploads/1/3/2/8/132814680/bosofirilid-sifuve.pdf
    • http://files.mahaloyallart.com/uploads/1/3/1/4/131437949/tuvomaga_xogerojodut_rexebowinet_dajaxekejobuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9588/files/34016299536.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/dejuwevokaselonafin.pdf
    • https://cdn.shopify.com/s/files/1/0433/2801/2456/files/prire__la_main_puissante.pdf
    • https://cdn.shopify.com/s/files/1/0436/5287/4390/files/bobine_transformateur_electrique.pdf
    • https://cdn.shopify.com/s/files/1/0435/8494/6333/files/93585390192.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/bloody_mary_morning_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/pampered_chef_white_chicken_chili.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/clash_royale_free_gems_no_human_veri.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/xagaduzab.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f88.bin
bb5917d5087c5039da2084c5923883727cc8aa975d7d35c9c0745f54fd7ac15a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F88 5128 bytes
font_01_sfnt_off000060df.bin
fe34823865c29f343d18aaf8e1d8a5805abe2127fb6377a3e3d09b3a7325f7aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x60DF 10020 bytes