Malicious PDF — malware analysis report

Static analysis result for SHA-256 953e29d0468d96f6…

MALICIOUS

PDF

48.3 KB Created: 2020-08-30 11:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23f11ed8204150b604005167aa0ca157 SHA-1: 093dbd662e2ea30c1cf4afef4044ab967ae2e81d SHA-256: 953e29d0468d96f6673476ce6e1f3078b61c145b62337ec797d6cc54e7eaa12f
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, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=ge+25006+4-device+universal+remote+codes', is presented as a lookup for remote codes, suggesting a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify. The ML classifier strongly indicates maliciousness. No scripts were extracted, but the primary malicious activity appears to be the redirection to a potentially harmful URL.

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/wix?keyword=ge+25006+4-device+universal+remote+codes
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/jalavunufotipedozitaki.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/baloxovevipe.pdf
    • https://cdn.shopify.com/s/files/1/0435/0207/6070/files/parallel_structure_worksheet_rewriti.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/81762297253.pdf
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/gavusosunenome.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9446/files/anodized_aluminum_sheet_for_engraving.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/xawufejasuxopatifazonu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2265/4362/files/princeton_apush_review_book_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/demand_driven_material_requirements_planning.pdf
    • https://cdn.shopify.com/s/files/1/0443/0499/0364/files/3_minute_persuasive_speech_examples.pdf
    • https://cdn.shopify.com/s/files/1/0432/5831/4912/files/tri_fold_brochure_size_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/wolobow.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/28471090863.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_off0000673d.bin
ef700338d70ec574f68232670d4882f6aa5c1041a1c07b1bbdfc2cd5449324aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x673D 5728 bytes
font_01_sfnt_off00007abb.bin
d47f1630b03e7fddce95f3c38a2527bc26bdb05ac9abb4f34511683be3ee226d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABB 13640 bytes
font_02_sfnt_off0000a67f.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA67F 4324 bytes

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