Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ceb441c3d12ab2…

MALICIOUS

PDF

48.5 KB Created: 2020-08-22 17:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85fbe9b91c51b8703e8d2c1e48eabb69 SHA-1: 17d1fed84323ffa1b689654b498b78a619b60dcc SHA-256: 03ceb441c3d12ab2daa1e0189f95a544a9f35e6106c19e66a6931624ca1e6bc1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to malicious content. The ML classifier also strongly indicated maliciousness.

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=guitar+chords+app+for+android+free
    • http://files.beyondablonde.com/uploads/1/3/0/7/130739542/fomoxesapugalob.pdf
    • http://kozosabi.karmicrescue.org/uploads/1/3/0/9/130969300/debile-jisigum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0466/5635/6517/files/how_to_make_checkmark_in_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/auditoria_en_sistemas_computacionales_carlos_muoz_razo_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0440/3465/4358/files/adjectives_adverbs_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/5032/6421/files/livro_para_adestramento_de_ces.pdf
    • https://cdn.shopify.com/s/files/1/0428/7794/3967/files/novadujekidi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/arthritis_diet_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69440205977.pdf
    • https://cdn.shopify.com/s/files/1/0429/1421/8151/files/30915992331.pdf
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/dcms_committee_disinformation.pdf
    • https://cdn.shopify.com/s/files/1/0434/5859/2921/files/zofifarevoledos.pdf
    • https://cdn.shopify.com/s/files/1/0433/1565/8920/files/6610496188.pdf
    • https://cdn.shopify.com/s/files/1/0431/3209/2573/files/manual_adestramento_de_ces.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007395.bin
72d1a92a1158fb19d7366649dcdaa202b0bc7b8414e14e86c7d00b2f384f99c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7395 5124 bytes
font_01_sfnt_off000084fa.bin
1642863786f65c7f4e74f5bc67eaa22918255296d2613503e2c5a41b1246534f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84FA 10012 bytes
font_02_sfnt_off0000a73d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA73D 4324 bytes

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