Malicious PDF — malware analysis report

Static analysis result for SHA-256 641117df2b52a540…

MALICIOUS

PDF

54.6 KB Created: 2020-08-10 10:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97f14cea739a1fef5da1090136eca74b SHA-1: c8bdda263c5fc66bc27b9f04845859801a047df7 SHA-256: 641117df2b52a5407bbdf94e64c83ee903507846079f1e91d67b133b5c9b10e2
154 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a known malicious domain, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'Amtrak schedules pdf' and the malicious URL itself, suggesting a phishing or scam attempt. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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.ru/pify?keyword=amtrak+schedules+pdf
    • http://files.lvsports.org/uploads/1/3/1/4/131438439/foxaroj_vijopi.pdf
    • http://files.mybodyofknowledge.net/uploads/1/3/1/3/131398251/8929755.pdf
    • http://files.ronnieroseband.com/uploads/1/3/0/8/130813797/a7f99.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5937/9357/files/valores_actitudes_y_satisfaccion_laboral.pdf
    • https://cdn.shopify.com/s/files/1/0436/1139/0115/files/8435329237.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/gezovuwuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/kuderosijopaxadaves.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5916/files/fogafuxemebenesez.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8510/files/42281989986.pdf
    • https://cdn.shopify.com/s/files/1/0439/4965/4184/files/zizigonesevirerijebuleku.pdf
    • https://cdn.shopify.com/s/files/1/0436/0011/7928/files/kakejumole.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9751/files/6909643374.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/62384267255.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/archies_manchester_menu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1559/files/16884146312.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_off00009618.bin
4b3dc61cff372d24f36b70a918aae47b088b2905badef793848531410341ae6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9618 5448 bytes
font_01_sfnt_off0000a878.bin
2cce917d4648ad0f317877a056a9f09e5bd77d9a685028d04e37423f61a3d401
pdf-font-stream PDF embedded font (sfnt) at offset 0xA878 10772 bytes