Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6cdbc1a5374080…

MALICIOUS

PDF

60.0 KB Created: 2020-08-09 07:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b070e28b0408c89f6e9de271f6f0c0a SHA-1: 75a239fc36d6df41271938f259a857820dff9656 SHA-256: 2b6cdbc1a53740809345762e9612c1f98264be59cba88661ef101042ab42ee0c
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links pointing to external PDFs, many hosted on Shopify. The primary malicious URL is https://ttraff.com/pify?keyword=metabolismo+de+carboidratos+pdf, which is likely used to redirect users 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.com/pify?keyword=metabolismo+de+carboidratos+pdf
    • http://wuzosi.limoservicealbany.com/uploads/1/3/1/0/131070493/pugez-pikipasip.pdf
    • http://files.annajmacdonald.com/uploads/1/3/0/7/130740190/lakuvipegovetup-wixanuzo.pdf
    • http://files.otccomedytroupe.com/uploads/1/3/1/8/131871690/pupip.pdf
    • http://files.maggietate.com/uploads/1/3/1/0/131070195/vuwosezivotolom.pdf
    • http://files.gracelutheranlansing.org/uploads/1/3/1/4/131437535/kidowifitosot.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/77749653286.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/63627274189.pdf
    • https://cdn.shopify.com/s/files/1/0429/1949/3785/files/levemife.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20675343362.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rerotapok.pdf
    • https://cdn.shopify.com/s/files/1/0438/6340/8795/files/fisupafugurawefusoxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/6854223786.pdf
    • https://cdn.shopify.com/s/files/1/0428/1889/6038/files/kasidedirek.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9957/files/film_form_definition.pdf
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/10716438244.pdf
    • https://cdn.shopify.com/s/files/1/0433/7490/3452/files/tezafuxupurowufarix.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/94044637651.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6661/files/missing_in_action_cast.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/domamusuvusuzexi.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_off0000ab36.bin
0c86ad5656e44daa8bbc7547ffe273b4f9c24cb27e493992dd9f0a7c6c0a561d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB36 5448 bytes
font_01_sfnt_off0000bda9.bin
9890356502b603b2fb21b7c6f0f371b973ed0093945b493b65f38e9514f9f1c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA9 10812 bytes

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