Malicious PDF — malware analysis report

Static analysis result for SHA-256 762e98c0bf47b0cc…

MALICIOUS

PDF

50.2 KB Created: 2020-08-02 16:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f2542de700acead85396a4a5d0352da SHA-1: 6a03888752a5787514f444cf5f83e15e3d48bd46 SHA-256: 762e98c0bf47b0cc10c6f306639f3e74d4e1caff6bd0c675af19a5a267a49881
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious URL, 'https://ttraff.cc/pify?keyword=java+config+files', suggests a redirection to potentially harmful content. While no scripts were directly extracted, the PDF structure and link farm behavior indicate an attempt to drive traffic to malicious infrastructure, likely as part of a phishing or SEO manipulation scheme.

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=java+config+files
    • http://files.bondentertainmentservices.com/uploads/1/3/1/4/131452958/8131597.pdf
    • http://files.manillashowsociety.net/uploads/1/3/1/1/131163684/5709582.pdf
    • http://files.anglersarsenaltx.com/uploads/1/3/1/8/131871725/9375144.pdf
    • http://files.intricatetaste.com/uploads/1/3/0/9/130969424/6b419.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/minirefotapobizezuloxot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32296476761.pdf
    • https://cdn.shopify.com/s/files/1/0428/1656/9500/files/25121706671.pdf
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/28244038290.pdf
    • https://cdn.shopify.com/s/files/1/0450/6569/9478/files/robot_modeling_and_control.pdf
    • https://cdn.shopify.com/s/files/1/0438/3748/9309/files/zegufo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7143/1065/files/81876501350.pdf
    • https://cdn.shopify.com/s/files/1/0438/3630/9666/files/gujofojifabevefegabag.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/79015644954.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6624/files/niroferunojapesonewekid.pdf
    • https://cdn.shopify.com/s/files/1/0436/1686/2371/files/mechanics_of_materials_6th_edition_solutions.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_off00007df0.bin
ebf15b2609f8c1b80398b204f8ed6be0854b19ab61a338d9e25386526c29be01
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF0 5000 bytes
font_01_sfnt_off00008f1c.bin
e39a1dc531d10dc6dc82987d3b9f1c5521f5c9f9831a9a1c5b31569a984fd191
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1C 14288 bytes