Malicious PDF — malware analysis report

Static analysis result for SHA-256 c80dc3ff03eec2d8…

MALICIOUS

PDF

44.7 KB Created: 2020-08-18 15:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2abea371de6425177e5fe2af0643b1ea SHA-1: 7d596f59d5c1a2bc0b3743c0656f80543bc373a9 SHA-256: c80dc3ff03eec2d87bf8a53099b02d34c39c4e82279ef1862ab3176bed9c0856
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=adjective+clauses+worksheets+for+grade+6'. The document body, though heavily obfuscated, also contains this URL and other PDF links hosted on Shopify. The ML classifier strongly indicates maliciousness, and the overall structure suggests a link farm or redirection attack designed to lead the user to malicious infrastructure.

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=adjective+clauses+worksheets+for+grade+6
    • http://xevevupu.thebayshorecondos.com/uploads/1/3/2/7/132712615/sotugova_zubefat.pdf
    • https://cdn.shopify.com/s/files/1/0433/5520/9879/files/6727291029.pdf
    • https://cdn.shopify.com/s/files/1/0432/9861/9557/files/wenibolulepape.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66264102559.pdf
    • https://cdn.shopify.com/s/files/1/0437/8332/3806/files/sistemas_economicos_capitalismo_e_socialismo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/vonarasubodubod.pdf
    • https://cdn.shopify.com/s/files/1/0439/4919/5419/files/tufoxizijokujavezosa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2096/6298/files/5369316837.pdf
    • https://cdn.shopify.com/s/files/1/0434/4794/3330/files/brush_pen_calligraphy_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/2122/2567/files/android_sdk_level_26.pdf
    • https://cdn.shopify.com/s/files/1/0436/1610/8701/files/20753859480.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_off00006286.bin
14898ef0eec7cbfeef8673d499440b66f1a4cf30be8c06a3396936a5390d6e69
pdf-font-stream PDF embedded font (sfnt) at offset 0x6286 5496 bytes
font_01_sfnt_off00007562.bin
c9e37eadacfe3ecf19ca02ac48b5a3abad520fa5453bd386a1003f578c418b1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7562 10100 bytes
font_02_sfnt_off000097e5.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x97E5 4324 bytes