Malicious PDF — malware analysis report

Static analysis result for SHA-256 a04785cc3a63d6bf…

MALICIOUS

PDF

43.7 KB Created: 2020-08-24 03:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f460168cb6cab7b1ac49bb849754ea6 SHA-1: a2a8b6083e1c1ba7e06d0d2bc517768665560a35 SHA-256: a04785cc3a63d6bff28ce2e029a4be70efd9303b5288e085cd1dbf2da6e41441
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: User Execution: Malicious Link

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=aoac+methods+of+proximate+analysis+free', is identified as a known malicious redirector. This suggests a phishing or malicious content distribution scheme, likely aiming to lure users to malicious sites through a chain of redirects or by hosting malicious content on seemingly benign platforms.

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=aoac+methods+of+proximate+analysis+free
    • http://teterozin.bobbrooksinsurancecassat.com/uploads/1/3/2/3/132302978/2732287.pdf
    • http://files.abigailcrscott.com/uploads/1/3/1/8/131857734/jiwotugujel-waromanapular-gelaloxamoleler.pdf
    • http://lopojit.badassoffitness.com/uploads/1/3/2/6/132682787/2370598.pdf
    • http://suzoz.eiddprints.com/uploads/1/3/2/8/132814930/rusigosub.pdf
    • http://jefevuwo.mugahedomar.com/uploads/1/3/1/3/131383363/vapexewa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4188/0224/files/administrao_financeira_e_oramentria_3d_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/8058/9207/files/arch_linux_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/xurazolagipamofodofumat.pdf
    • https://cdn.shopify.com/s/files/1/0434/6934/0822/files/zumevubopowixoxopudikis.pdf
    • https://cdn.shopify.com/s/files/1/0435/5283/3695/files/kulodipotewugawunufenidum.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/gosuvigebafuxofadu.pdf
    • https://cdn.shopify.com/s/files/1/0451/0469/3400/files/aquaponics_journal_download.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/identity_malta_position_description_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/2273/5767/files/las_brujas_no_se_quejan_libro.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3799/files/tutorial_adobe_audition_1._5_bahasa_indonesia.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_off00006cc0.bin
8319584d033eacacb65466447631b680c956a3ff44402c60fe9bf2f606a03220		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC0 5556 bytes
font_01_sfnt_off00007f86.bin
4d1b416d3a1216c2ee989d1769bffdd6bc001232ce56cee02062948c3ce9b93e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F86 10144 bytes

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