Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efc34104d6e4205…

MALICIOUS

PDF

46.0 KB Created: 2020-08-21 21:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a50b63c05c06ee9bb91dcb9305a7382 SHA-1: 7503a844771597466320b7074e2f0ee9dfa3eded SHA-256: 2efc34104d6e42054d845ef243784ffa6412fe1ceceb9c5db944022384130814
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a resume. This indicates a phishing or malware delivery attempt. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm used to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious.

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=regulatory+reporting+accountant+resume
    • http://mozopona.hannah-ayers.com/uploads/1/3/1/3/131398294/jozufofupe_kesizuro.pdf
    • http://files.riinamakeup.com/uploads/1/3/1/1/131163920/cfdacf022d1.pdf
    • http://files.watch-new-movie.com/uploads/1/3/0/7/130739155/9c47385b371b.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/94615969090.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6293/files/zepefokebeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53975554289.pdf
    • https://cdn.shopify.com/s/files/1/0436/7892/4953/files/70783676064.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/90212657000.pdf
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/bunutujade.pdf
    • https://cdn.shopify.com/s/files/1/0431/7967/1718/files/pekas.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/organic_chemistry_notes_for_class_10_icse.pdf
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/vipiwamebokototubemu.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_off000067b1.bin
fd10a96869ebc1b837d9dfc0acc747f80fb5c4e027bfadb33a76e5bd1d7ea5f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x67B1 5244 bytes
font_01_sfnt_off0000797e.bin
f9f1ff0a59ae737ae02b0a9f4c81f65515409b827095ca3e5fb78c4c4c77539c
pdf-font-stream PDF embedded font (sfnt) at offset 0x797E 10276 bytes
font_02_sfnt_off00009c9b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C9B 4324 bytes