Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab34d301d9c1a4f…

MALICIOUS

PDF

52.0 KB Created: 2020-08-25 03:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2576571a1acdb86baf910c12ba847a1 SHA-1: a680bd91ed49d2fcfebd2cb28b5b78ff89bdbe1b SHA-256: 6ab34d301d9c1a4f570b7d027525439cf2748fb6f8b9e3c087174573a6f7379f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a redirector URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains text related to 'Amd radeon r5 m330 driver linux' and a URL that appears to be part of a link farm, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect the user to a malicious site.

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.ru/pify?keyword=amd+radeon+r5+m330+driver++linux
    • http://files.graphicsbyjam.com/uploads/1/3/1/4/131408068/soluvivotaralo.pdf
    • http://guxixelur.deepfocusfilmstudies.com/uploads/1/3/0/8/130813478/relepij_somepoxefel.pdf
    • http://files.wizardsfastpitch.net/uploads/1/3/0/7/130776267/3343932.pdf
    • http://files.cambriacountycampcadet.org/uploads/1/3/0/7/130775223/1873094.pdf
    • http://files.loaraband.com/uploads/1/3/0/8/130873921/wenurovurises.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/8509/3281/files/invertebrate_paleontology_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/rutolamipukabexota.pdf
    • https://cdn.shopify.com/s/files/1/0432/6142/7867/files/rodusalarelukira.pdf
    • https://cdn.shopify.com/s/files/1/0437/2152/3349/files/acordes_de_guitarra_para_principiantes_canciones.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/fetebavipameme.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/vexebixa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/721071891.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/ffxiv_how_to_buy_a_house.pdf
    • https://cdn.shopify.com/s/files/1/0431/8412/8151/files/medusitedunijotowumapiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/bangsamoro_law.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_off00007e6c.bin
c4561638403ac96613536fdc347faacfaaea7101f756b43502ea8da0ae758cb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6C 5144 bytes
font_01_sfnt_off00008fc6.bin
87124c44b2fbd27db1c765fe6369f576a41e5bd64d54ae58ed37a97e1adc9f6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC6 10820 bytes
font_02_sfnt_off0000b49f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB49F 4324 bytes

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