Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a6c02fc55f1ae0a…

MALICIOUS

PDF

63.3 KB Created: 2020-08-02 02:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63411ac653620a42d8709fb573103124 SHA-1: 90ac0051d6f2aa4f2748aabb16c86e0db4a25360 SHA-256: 7a6c02fc55f1ae0af934360b74583e5ff591bcc73173425a44613bf3f455c22c
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection scheme. The primary redirector URL, https://ttraff.com/pify?keyword=goosebumps+books+pdf, is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack, likely intended to lead users to malicious content.

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=goosebumps+books+pdf
    • http://files.strategicsolutionsint.com/uploads/1/3/0/9/130969992/198142c4772.pdf
    • http://files.allcustomiron.com/uploads/1/3/0/8/130874201/2779360.pdf
    • http://files.lanawijnands.com/uploads/1/3/1/3/131382274/jadenamofez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1986/2179/files/jipemadimafodizusotumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/2912127435.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/kavepusamu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/11674543038.pdf
    • https://cdn.shopify.com/s/files/1/0428/6329/6678/files/56426601385.pdf
    • https://cdn.shopify.com/s/files/1/0434/3952/1958/files/19915611078.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/jowedoniwagup.pdf
    • https://cdn.shopify.com/s/files/1/0438/7156/8040/files/vowus.pdf
    • https://cdn.shopify.com/s/files/1/0429/9125/5713/files/94663661778.pdf
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/tokuvotimaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/3446/0828/files/wemomugaraxepo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/88111689549.pdf
    • https://cdn.shopify.com/s/files/1/0428/4284/9446/files/jofisawize.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_off0000b6b3.bin
ca406672a75e3ca59a9c1fb27c00a668572d36ded71c389e53fd856470188029
pdf-font-stream PDF embedded font (sfnt) at offset 0xB6B3 5084 bytes
font_01_sfnt_off0000c7f4.bin
f6a670ded9cab49be1022b7ca86a88a4e621919d40f2a280cc1d11b0b7791e9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F4 11648 bytes