Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb6fb15bda4d6de…

MALICIOUS

PDF

43.5 KB Created: 2020-08-06 17:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12db297df4614dc4ba2ada2316be1d79 SHA-1: 319c44fbb4e449a556cbcdb4ea5a98b516f0e078 SHA-256: afb6fb15bda4d6de4942308935045d8d442f5ef127964d5c72724fc2cfce1d0c
152 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains a significant number of external links, indicating a link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=biotic+and+abiotic+factors+worksheet+pdf', is identified as a malicious redirector. This suggests the document's purpose is to lure users to malicious sites, likely for phishing or malware distribution.

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/pify?keyword=biotic+and+abiotic+factors+worksheet+pdf
    • http://files.masleonphotography.com/uploads/1/3/0/9/130969825/lamado.pdf
    • http://files.np4yaxham.com/uploads/1/3/2/6/132695575/5cdfd9c1c.pdf
    • http://noxikema.kimberlyandersonritchie.com/uploads/1/3/0/7/130776445/woxolesepobenejusole.pdf
    • http://files.nickjagger.org/uploads/1/3/1/4/131407029/2414756b.pdf
    • http://fasotenu.theholisticrefugeranch.com/uploads/1/3/1/6/131606875/f8a28913c0d4.pdf
    • https://cdn.shopify.com/s/files/1/0437/2830/6330/files/paxojimelor.pdf
    • https://cdn.shopify.com/s/files/1/0437/9246/6080/files/funakadin.pdf
    • https://cdn.shopify.com/s/files/1/0428/7637/1110/files/94859095832.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/dozew.pdf
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/koraladabegu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rewosegukedisupagur.pdf
    • https://cdn.shopify.com/s/files/1/0430/6331/2533/files/characterization_of_nanoparticles_by_uv_vis_spectroscopy.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/binitawiweluwej.pdf
    • https://cdn.shopify.com/s/files/1/0436/5372/6358/files/wuxavazajimu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/celebrate_recovery_participant_guide_1.pdf
    • https://cdn.shopify.com/s/files/1/0428/3862/2375/files/lupowigenupitepusi.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_off0000559d.bin
f8b791a7abb1a68a9163d871d8a04415b3f4eda4a4e6f78a273d6e15baf0e1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x559D 5556 bytes
font_01_sfnt_off00006890.bin
c9fcbd130daf03bcddcecd38617f3f6cfc0bbc171f0fe9dc575f060c9552a988		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6890 10172 bytes
font_02_sfnt_off00008b7a.bin
70180b97a9b9fe0de1e0c05b06d733d04658c9f7a2923a3eee6842afe753d47e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7A 16152 bytes

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