Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6225ad8af197b5…

MALICIOUS

PDF

42.9 KB Created: 2020-08-23 19:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b532a6fa90f0afea701aa51a736dd1e SHA-1: ecabe2f4c6993150875837e30a8263648efd42a8 SHA-256: 9a6225ad8af197b572f970dc65271610826f2dd60a943d2a506e5bc3858763b5
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=bill+of+sale+word+template+as+is', is designed to lure users into clicking it by masquerading as a bill of sale template. The redirector then leads to further malicious infrastructure, as indicated by the PDF_SEO_LINK_FARM heuristic which found numerous external links, including one pointing to 'https://cdn.shopify.com/s/files/1/0428/9993/1295/files/mumosaxalamexaguzoba.pdf'.

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=bill+of+sale+word+template+as+is
    • http://takas.jeffreybirdjr.com/uploads/1/3/1/4/131437792/kowokopenogedud.pdf
    • http://gidudepux.touchofheavenranch.com/uploads/1/3/0/7/130775934/mefuworelirexore.pdf
    • http://files.daisyhillacademy.us/uploads/1/3/0/8/130874658/noxofejivab-duvuraginaluv-detupojenoto.pdf
    • http://jupen.apollonasglykas.com/uploads/1/3/1/4/131406286/2596437.pdf
    • https://cdn.shopify.com/s/files/1/0428/9993/1295/files/mumosaxalamexaguzoba.pdf
    • https://cdn.shopify.com/s/files/1/0438/8693/6219/files/wells_fargo_bank_statement_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/6362/3330/files/chambers_netflix_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/62549383370.pdf
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/xawaxotezorotinar.pdf
    • https://cdn.shopify.com/s/files/1/0463/1756/8157/files/the_masculine_gender_of_spinster_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1077/files/6294124617.pdf
    • https://cdn.shopify.com/s/files/1/0453/2492/7131/files/11th_botany_practical_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/3994/7932/files/definicion_de_evaluacion_diagnostica_segun_autores.pdf
    • https://cdn.shopify.com/s/files/1/0462/6513/9354/files/wulujevurejuvi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9292/5852/files/capabilities_and_limitations_of_a_computer.pdf
    • https://cdn.shopify.com/s/files/1/0463/3070/8129/files/zigemelukosikitodunevewo.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_off00006912.bin
1b17a518b9bcd6b85eb201b389cb8ae5e668aef7bf7907243976f351b8d08e77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6912 5328 bytes
font_01_sfnt_off00007b24.bin
97b99352280b01cef86674f1f6c937d2b40153a1d36a9c6a8dba4928a57ff583		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B24 10364 bytes

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