Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db42da1fc0739ac…

MALICIOUS

PDF

48.8 KB Created: 2020-08-08 03:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6a156d48ae4a2067e70fb6d1470e73e SHA-1: 8636b1db190d32221341bb3ace9a126ddf02bf7d SHA-256: 0db42da1fc0739ac710e27744a8111c441f626293e9336a4d62b46c416870504
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector's target. This suggests the PDF is designed to trick users into visiting malicious sites, likely for phishing or to download further malware.

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=alberta+budget+2020+pdf
    • http://files.crueltyfreecuisine.com/uploads/1/3/1/4/131454270/b292d9f3d25b01.pdf
    • http://files.mamagonenatural.com/uploads/1/3/1/4/131437508/f7877.pdf
    • http://files.marissaworks.com/uploads/1/3/2/6/132682892/1290983.pdf
    • http://files.patricedworkinart.com/uploads/1/3/0/7/130738765/jixetow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5252/3929/files/sevabigevuvav.pdf
    • https://cdn.shopify.com/s/files/1/0433/6294/3144/files/88325938750.pdf
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/58152323175.pdf
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/form_i-_862.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/suluzanosamarow.pdf
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/17510065481.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/menebis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mijafovaginidobu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/xemegenitudefevapiwub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1605/1112/files/75320538622.pdf
    • https://cdn.shopify.com/s/files/1/0439/0594/1672/files/fodisevuzarasivawopiwa.pdf
    • https://cdn.shopify.com/s/files/1/0438/3657/1808/files/atomic_habits_reddit.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_off00007db5.bin
989327f2c9fd0a2a3e62c529e8cbd8f261a2484fe660e43e45796e6332fe1248
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB5 5436 bytes
font_01_sfnt_off0000903b.bin
d2a01fe04d5ae3ec435b5e63ccb0d1d487d25b3b844b1f84319f6e32c6aa612a
pdf-font-stream PDF embedded font (sfnt) at offset 0x903B 11124 bytes