Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9417d6cc48a2e7c…

MALICIOUS

PDF

50.0 KB Created: 2020-08-23 07:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09f66e6d36a9efb8c6ca0d99694af171 SHA-1: 40e8ac903612c867752b667af048229a4d44664b SHA-256: d9417d6cc48a2e7c5fdada070cbea0bd59cdf3df810181a363590148622f5695
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing. This indicates the document's primary purpose is to redirect users to malicious sites, specifically identified as ttraff.com. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, likely to obscure the malicious redirector or to distribute a large number of SEO-optimized malicious links. The document body contains the malicious URL and several other URLs, some of which are benign but others are unknown.

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=billiard+games+free++mobile
    • http://files.athensmediation.com/uploads/1/3/0/7/130776166/2798112.pdf
    • http://mivonaja.dovianwo.org/uploads/1/3/0/9/130969723/93ea68879e37f0a.pdf
    • http://files.onesailorboutique.com/uploads/1/3/2/6/132695438/lovabesifobizu-jufosaw.pdf
    • http://files.artisanbuiltins.com/uploads/1/3/1/6/131606345/lalazafonovukadej.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/electric_current_class_10_ssc.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2634/files/gekezetabutifisopija.pdf
    • https://cdn.shopify.com/s/files/1/0428/0372/4455/files/actrium_holistic_dog_food_feeding_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/8239/0431/files/2114604167.pdf
    • https://cdn.shopify.com/s/files/1/0434/0714/7166/files/wuvidirolemu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6667/8696/files/71630395450.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8114/files/rna_seq_analysis_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0435/4487/1063/files/oxford_f_b_service_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/3897/2831/files/lagu_selamat_ulang_tahun_bahasa_thailand.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5209/files/bumedo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6158/3776/files/21145288339.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/13483261188.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_off000083ea.bin
fc3d4f8acabc77a452dd606e302a53dc7f4ea085cd53b6014b38764aba31f7bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83EA 5416 bytes
font_01_sfnt_off00009638.bin
e99701033cfbc1760fbdd66e7cb9c6e882ee9a073a2ae8c71456f3415ed08f8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9638 10684 bytes

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