Malicious PDF — malware analysis report

Static analysis result for SHA-256 a524e291d19db392…

MALICIOUS

PDF

43.6 KB Created: 2020-08-26 02:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 213c208327d5306de453ed7d2d1716f5 SHA-1: 57def8405116cbe916ee22112e7977914c7d1044 SHA-256: a524e291d19db39296c7e72a1e93603af3cedc14f3fa8a09d3a94caa3a872685
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.com/pify?keyword=cores+de+cabelo+de+outono+profundo`. This URL is likely part of a phishing or scam campaign. The document body, though partially corrupted, also contains this URL and other links, suggesting an attempt to lure the user to malicious content. The presence of numerous embedded URLs, many pointing to Shopify, indicates a link farm strategy, likely for SEO poisoning or distributing 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=cores+de+cabelo+de+outono+profundo
    • http://tazivu.lostarkwoodworks.com/uploads/1/3/0/7/130775169/kowigexi_movuzebemevi.pdf
    • http://mebinuxo.thewarinthepacificthurfilm.com/uploads/1/3/1/3/131379808/4550112.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/56695257073.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/mojekevesabelojamatoxavon.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6051/files/persuasive_writing_graphic_organizer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nunixa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4545/2967/files/cattle_production_in_zimbabwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/1402/0505/files/mla_citation_purdue_owl.pdf
    • https://cdn.shopify.com/s/files/1/0429/4118/6215/files/pearson_verbal_ability_and_reading_comprehension.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/tavise.pdf
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/zorijipawufufa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5205/7244/files/cavalleria_rusticana_verga.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b27.bin
d66daf1bad04974288c7e37a9224c7a4edd378628d45b804237e6b96c8afcdd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B27 5144 bytes
font_01_sfnt_off00006ca9.bin
d4366f2ac87bec6a3067aad2fb79e6c2a9d1f47cdfcc0ec8cb556de895e2d304
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA9 12180 bytes
font_02_sfnt_off000091d3.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x91D3 4324 bytes