Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9e7d49ddf87311…

MALICIOUS

PDF

46.8 KB Created: 2020-08-02 16:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f89519f62a17e6abb8137e1634746be5 SHA-1: 35cfe53258dd83cfc2b65ecdbb4308c8f7908c11 SHA-256: 5b9e7d49ddf8731177ff05e81217fed7b974cefdf9e0168837f75ed60a5994b6
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed to lure users with search-related keywords. The ML classifier strongly indicates maliciousness, and the presence of numerous external PDF links suggests a link farm or SEO poisoning tactic. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document body and malicious URLs.

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.com/pify?keyword=central+machinery+band+saw+parts
    • http://files.huntingtoncentral.com/uploads/1/3/1/3/131379894/lewerisirir.pdf
    • http://files.tadrisacademics.com/uploads/1/3/1/3/131383493/1770795.pdf
    • http://files.annabellehughes.com/uploads/1/3/1/6/131637881/04a35d51f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/94487533054.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/lafupekufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6830/9152/files/rasamifumevifituve.pdf
    • https://cdn.shopify.com/s/files/1/0435/1049/7434/files/k_on_episode_1_english_dub.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/6588384294.pdf
    • https://cdn.shopify.com/s/files/1/0427/7554/3964/files/617917160.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4701/files/69860333973.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/2001_dodge_ram_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4980/3162/files/pixowamefi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6594/0904/files/buxugijetonugewoxemote.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tefukina.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006981.bin
1cec857687e1f4d59b51bdb087ad5b78e2d43a08f36ce9593552a1751ae6b845		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6981 5348 bytes
font_01_sfnt_off00007b84.bin
898baa224312da754f09f339a74746a876931447960256e0887d12d08fd3c81a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B84 10760 bytes
font_02_sfnt_off0000a03a.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA03A 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.