Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e29a16ff8468651…

MALICIOUS

PDF

49.1 KB Created: 2020-08-30 15:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de93cf574284a19a461e9090c5fafee3 SHA-1: 8ab43d567c15c047c5e8d4cc411e384523e46507 SHA-256: 8e29a16ff846865172e9c310224dfd8059f4e7bdc55a305c4fced6fd5e6d811b
152 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 'ttraff.com'. This URL is likely part of a phishing or scam campaign. The document also contains a large number of embedded URLs, many pointing to Shopify, which is indicative of a link farm used for SEO poisoning or to host malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted from this sample.

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/wix?keyword=mcgraw+hill+international+accounting
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/71893882968.pdf
    • https://cdn.shopify.com/s/files/1/0435/5332/5224/files/small_construction_company_profile_sample.pdf
    • https://cdn.shopify.com/s/files/1/0435/0876/0735/files/21731107923.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/basic_english_grammar_usage.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/mimamesawokonetepe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/easy_division_worksheets_for_2nd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0438/2657/7570/files/cha2ds2-_vasc_risk-_factor_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3851/files/cask_of_amontillado_edgar_allan_poe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/57796823178.pdf
    • https://cdn.shopify.com/s/files/1/0432/4491/2802/files/miguxotosevodizek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/casting_process_defects.pdf
    • https://cdn.shopify.com/s/files/1/0428/9639/2348/files/rubevolazododugaxu.pdf
    • https://cdn.shopify.com/s/files/1/0457/6241/2708/files/conclusion_de_las_relaciones_interpersonales.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b36.bin
621f508c369090a4d16c0c18de2f01f0e1fee8afe844e74308014cc84a1125ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B36 4980 bytes
font_01_sfnt_off00008c34.bin
1c498946e4f5ce6cdde6612aee74e2abd93953cac564e7d7b416f7b9d039bf40
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C34 13608 bytes