Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e50b444377ac82…

MALICIOUS

PDF

46.3 KB Created: 2020-08-01 02:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 979b753d2d2500d09d1fa8b6799a58c9 SHA-1: 91451d5819543173869d11e932ea4177d8d8c921 SHA-256: 78e50b444377ac82fc7a68fea95604c97201d084220ba12c9a94309fcf50929a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links, including one pointing to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous PDF links indicates a link farm strategy, likely to distribute malware or conduct phishing.

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=joe+budden+rage+and+the+machine+leak
    • http://files.centennialpto.org/uploads/1/3/0/8/130874655/4521385.pdf
    • http://files.lohmeyerdesign.com/uploads/1/3/1/4/131452861/wudigexitivi-vutimu.pdf
    • http://files.quicktan423.com/uploads/1/3/0/8/130874086/guletut-zebub-jepuvez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/suganatujod.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/jitolelomuzasixazewo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3064/2837/files/48017867116.pdf
    • https://cdn.shopify.com/s/files/1/0435/3314/0127/files/zeweretufifijogewamo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6054/3138/files/92234017027.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/zosisogedapasesej.pdf
    • https://cdn.shopify.com/s/files/1/0431/4900/0864/files/kujeva.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/80180247099.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49816413057.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/68945494278.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_off00006a08.bin
3f9b8cba9382f33f444c1bfbe49031329f5b4d9efce22520a715aa82a6c03f15
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A08 5248 bytes
font_01_sfnt_off00007ba2.bin
c647eb8ffe421c4c8a03913543e0701257862e12b552cb80cc30277e1578e089
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA2 10000 bytes
font_02_sfnt_off00009dd4.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD4 4324 bytes