Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9c6a487ae62ede…

MALICIOUS

PDF

40.5 KB Created: 2020-08-22 18:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30f62f5ea75d92262700204db18b45c6 SHA-1: 3b6d9b42e7b585c098124a4d2c0211508fa603ec SHA-256: 6e9c6a487ae62edeb9d4ba80e1fee3ef8371ce0687f5c8c69890b97f1023fc99
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same keyword as the malicious URL, suggesting a lure. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to distribute the 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.cc/pify?keyword=video+ceramah+lucu+ustad+tile
    • http://files.msashowcase.org/uploads/1/3/2/8/132815054/pawur-rokimunukan.pdf
    • http://files.kohicleaningservices.com/uploads/1/3/0/7/130775245/nesaniwiwekijen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3673/5650/files/63932887561.pdf
    • https://cdn.shopify.com/s/files/1/0431/6440/1818/files/storyboard_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/1081305616.pdf
    • https://cdn.shopify.com/s/files/1/0434/0226/4741/files/pdf_afasia_de_broca.pdf
    • https://cdn.shopify.com/s/files/1/0431/6931/7013/files/vikunijiralemefutituz.pdf
    • https://cdn.shopify.com/s/files/1/0439/4863/8363/files/annexure_2_income_tax_calculation_form_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3383/files/battle_bears_gold_accounts.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/55935142696.pdf
    • https://cdn.shopify.com/s/files/1/0446/2179/1395/files/hernia_hiatal_tratamiento_nutricional.pdf
    • https://cdn.shopify.com/s/files/1/0431/3474/6790/files/84283308891.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/korea_visit_visa_application_form_pakistan_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/2544/0669/files/55763260455.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_off00005cac.bin
f63dc676e9e804903c61255d0450df8f28a5b939d9dad198485f217195a8257f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAC 5144 bytes
font_01_sfnt_off00006dff.bin
7591be54632daf363a95b920ad1358283ed115ae5ca8dc0cc237a41783cc4a38
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFF 12292 bytes