Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3aec4e68e26eb1a…

MALICIOUS

PDF

40.3 KB Created: 2020-08-04 05:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb1aa99e1e80436fdd1fb379fc679be9 SHA-1: ffb14aa53cefa79621dacce0d7e4b6022f598b82 SHA-256: d3aec4e68e26eb1a406ab964beb104b119c484bfaecb7e72d2315189fd861d16
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a product manual, aiming to trick users into clicking it. The ML classifier strongly indicates malicious intent. The document body and embedded URLs suggest a social engineering lure, likely leading to further malicious content or malware download. No scripts were extracted, limiting the analysis of direct execution behavior.

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/wb?keyword=zojirushi%20bb-cec20%20manual
    • http://files.allisonlbaird.com/uploads/1/3/0/8/130874642/7950302.pdf
    • http://files.kpadgett.com/uploads/1/3/1/3/131383981/jufuvilorim_xunejuralas_kivixuz_jizon.pdf
    • http://files.ledgewoodwater.org/uploads/1/3/2/3/132302896/tavanurupobimoge.pdf
    • http://files.learningthroughteaching.com/uploads/1/3/0/9/130968917/448936.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5675/files/xegarag.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/83420919507.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sasukeseduvemuledup.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/12329822997.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/puvikasurureso.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/fevogaxozinajusaxev.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1298/files/46727107958.pdf
    • https://cdn.shopify.com/s/files/1/0440/7335/3381/files/33036145747.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5907/files/37503712520.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/epic_training_manuals.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_off00005e4d.bin
ccfe0cfb8558bcf05d0f57e43eb99f52d91a6eb686c2855d1554e0ac5ca33884
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4D 5520 bytes
font_01_sfnt_off000070f3.bin
dc591c5cb78d3a9d1bf812faca572c81f3c27cef985061ed553b5fb8a5c693bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x70F3 10476 bytes