Malicious PDF — malware analysis report

Static analysis result for SHA-256 2714f48b7694ade7…

MALICIOUS

PDF

42.0 KB Created: 2020-08-02 08:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fd4f6b1a65e806df402ccc15cff6673 SHA-1: a27249efdcf8e398a4c0dbde65dbdcd4f9598238 SHA-256: 2714f48b7694ade70d233a648b043077407cfc0bd80ec42e8844dbb2a64cf628
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF files, suggesting a coordinated effort to distribute malicious links.

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=clip.+dj+free+download+mp3+songs
    • http://files.altoonaenglishclub.com/uploads/1/3/1/3/131379118/mokokejo-sefivafere.pdf
    • http://files.kenmauronmusic.com/uploads/1/3/0/7/130775257/4662637.pdf
    • http://files.andrealimauro.com/uploads/1/3/2/3/132302871/200348d88d69387.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/luropepolobilejazaxavidor.pdf
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/photoshop_cs6_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/72896251341.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/73660595305.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/wuxixefevexasabozisipotam.pdf
    • https://cdn.shopify.com/s/files/1/0440/1194/6134/files/83821769561.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/bowflex_xtreme_workouts.pdf
    • https://cdn.shopify.com/s/files/1/0440/6788/1125/files/58059454266.pdf
    • https://cdn.shopify.com/s/files/1/0438/5941/1094/files/25392698553.pdf
    • https://cdn.shopify.com/s/files/1/0431/2648/9249/files/berowelaluvininuwar.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_off000064ee.bin
c9ec266ee64cfe102a54d5c663641f95ef4ed62e409e6f26c705a089feb36802
pdf-font-stream PDF embedded font (sfnt) at offset 0x64EE 5632 bytes
font_01_sfnt_off0000781f.bin
4dd11291e3e3dfe765f6ddc1936499f353fbd2f1610a4e970d4467e30c6473f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x781F 10308 bytes