Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cfec9faac356d86…

MALICIOUS

PDF

84.8 KB Created: 2020-09-08 19:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 275bfd2fa9cfae3aa084f0c5b7ebd874 SHA-1: c712e802cd54c1e4c24448ee1790d82efd9257cc SHA-256: 5cfec9faac356d8655529344d6584e5ad999e8e29d3bbe1c6577fe482b66630c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=atalasoft+dotimage+lic`. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to software licensing. The presence of numerous external PDF links, many pointing to benign content, suggests a potential SEO poisoning or link farm tactic to distribute the malicious document.

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=atalasoft+dotimage+lic
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/5926b4_c55adf71c7bf4e8ca8a7ddcce7af852a.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_fc0edca05d9c4cb0b296f14efeb443d0.pdf
    • https://static.usrfiles.com/ugd/145364_034b6ec9978b49e8b79889510ce9469e.pdf
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/fupafol.pdf
    • https://cdn.shopify.com/s/files/1/0437/8807/5159/files/14563855973.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6007/files/heartbeat_song_bts.pdf
    • https://cdn.shopify.com/s/files/1/0432/6411/4852/files/mount_saint_benedict_college_uniform.pdf
    • https://static.usrfiles.com/ugd/cf14a4_9dea85ee21b2434c9e4d447f7db78f83.pdf
    • https://static.usrfiles.com/ugd/5ecadc_bc6f8ebeefd64cc59841fd030ff53a32.pdf
    • https://static.usrfiles.com/ugd/82e28d_365c673b8aaa4957aa305eabe40c2974.pdf
    • https://static.usrfiles.com/ugd/76aeb6_04c60d373608488eb009ad65a83fbcb0.pdf
    • https://cdn.shopify.com/s/files/1/0435/3117/4039/files/mutant_creatures_mod_1._7._10.pdf
    • https://cdn.shopify.com/s/files/1/0435/6289/3471/files/al_capone_does_my_shirts_book.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_off000105c9.bin
dc0499b60b18bcbef5a85b9e323787dd3f102cc6113f3c7dc93848c311a67c42
pdf-font-stream PDF embedded font (sfnt) at offset 0x105C9 5236 bytes
font_01_sfnt_off0001178a.bin
2d8eea5e5db0fbb992d3ac295d00761541410b91f2d710e7cd0174c53065a3dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1178A 14916 bytes