Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba494b475f8e181f…

MALICIOUS

PDF

31.5 KB Created: 2020-08-06 18:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2541603ce85220089066886bf552aea0 SHA-1: fa70e053204ad804d588c40adc454e233d28f0f9 SHA-256: ba494b475f8e181f3092797bdb3ef7b4e87bf6c8770ab54014222b8c58a66bc1
174 Risk Score

Malware Insights

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

This PDF document is designed as a lure, presenting itself as a Cessna 172 pilot handbook but containing only an image and a click-outward action. The primary link directs to a known malicious redirector infrastructure at https://ttraff.ru/pify. The document also contains a large number of links to other PDFs hosted on various domains, suggesting a link farm or SEO poisoning tactic. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 31 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=cessna+172+poh+pdf
    • http://pelurege.tinytouchoflove.org/uploads/1/3/0/7/130740596/28daf.pdf
    • http://files.oiim.net/uploads/1/3/1/0/131070792/suvekefokebati.pdf
    • http://files.bassreevesconference.com/uploads/1/3/0/7/130776864/eac8b0e01878a.pdf
    • http://files.kelleyintegrity.com/uploads/1/3/0/9/130970003/84a094c03d979a9.pdf
    • http://files.middlingsort.com/uploads/1/3/0/7/130776033/84ae225d3d.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/fikusexotejubipib.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/mogiziwovapilawozanob.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4344/files/tejej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fokukivovasogu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/bin_sachivalay_clerk_model_paper_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9058/files/50586389161.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8232/files/japuripo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/47308050139.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5792/files/xekitagawizaseka.pdf
    • https://cdn.shopify.com/s/files/1/0434/2913/4487/files/fifumidataxupum.pdf
    • https://cdn.shopify.com/s/files/1/0431/8108/0725/files/90759756578.pdf
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/annihilation_of_caste_in_tamil.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_off00004639.bin
ee2e53d43ac633794103ed613a40dc0ae0decbbbc6e3373ff1a7eecee661fc3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4639 5172 bytes
font_01_sfnt_off000057df.bin
5cc122a80eb9a0008b825e9a8548ab0f6cb62b70dac5ffb396300bb0c030caea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57DF 7528 bytes

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