Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c868c555d8e0be…

MALICIOUS

PDF

52.0 KB Created: 2020-08-07 14:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 381935f0ca19f41da0eb1e80beee7e30 SHA-1: c006f888a49d3c9d58f8700a4f2eb272a9630518 SHA-256: b3c868c555d8e0be68a8f224fd2e18b47bdca294f0b2b639fcf39f749391b0f8
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of SEO-linked PDFs. The embedded URLs, particularly the one pointing to ttraff.ru, are indicative of a link farm or redirection scheme designed to lead users to malicious content. No scripts were extracted, but the sheer volume of outbound links suggests a content-scraping or link-farming operation.

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=behaviour+management+strategies+in+the+classroom+pdf
    • http://files.murrietajunkremoval.com/uploads/1/3/0/8/130814535/pikusab-jutixoxoxalugit-sovejepeso-wejapulatoteko.pdf
    • http://files.audiocognoscenti.com/uploads/1/3/1/1/131163540/1408628.pdf
    • http://files.joanobeirne.com/uploads/1/3/0/9/130969889/furenibupa.pdf
    • http://files.michiesdogmeatsandtreats.com/uploads/1/3/0/7/130776503/fapiwulamu-darumirakonu-matoxapi-kenurabelapefe.pdf
    • http://files.nevebros.net/uploads/1/3/1/6/131637108/4e4596c9bb.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/cazadora_de_hadas_brave.pdf
    • https://cdn.shopify.com/s/files/1/0435/2219/5608/files/renitiwonuvalinuxobikuva.pdf
    • https://cdn.shopify.com/s/files/1/0429/1090/8572/files/83068715822.pdf
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/gujisi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/82052791606.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6530/files/reverberatory_furnace.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/15821485067.pdf
    • https://cdn.shopify.com/s/files/1/0437/1785/3335/files/victorian_age_vampire.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xoperesotojazi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9437/5576/files/bokadobesezedibolanusa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7804/9189/files/rivixazole.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/zawitaxitadesotusafati.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9588/files/kurepur.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_off00007f61.bin
3e5a746ff26c1604b85d1178115922ad0dcfc7e6ad3d447f2d47adacd70a731a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F61 5560 bytes
font_01_sfnt_off00009228.bin
ddfb390d305c8e306bf2c201fce87c65187158819d1fd6a6e498ca29a8dcbfa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9228 10004 bytes
font_02_sfnt_off0000b454.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB454 4324 bytes

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