Malicious PDF — malware analysis report

Static analysis result for SHA-256 c24a01c8343214ab…

MALICIOUS

PDF

38.4 KB Created: 2020-08-18 23:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b4712c6b3f8872c6dab978e3f7674ff SHA-1: caf261d23ab393d468a27b8e4a6955d9d3720bc9 SHA-256: c24a01c8343214ab744c7deab69acd77656aaeaf259f5469b8daf3f9c4b34909
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=android+auto+non+funziona+con+huawei'. Additionally, the PDF hosts a large number of external links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic. The document body, though partially corrupted, contains the same lure text as the malicious URL, reinforcing the phishing attempt. No scripts were extracted from this sample.

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=android+auto+non+funziona+con+huawei
    • http://donino.marygolden.studio/uploads/1/3/0/7/130775440/gumixugogo-tenopuzux-barivomez-sobewafotekoza.pdf
    • http://files.seanellishusseycomposer.com/uploads/1/3/1/4/131437599/9663073.pdf
    • http://files.katarinatuffvesonjensen.com/uploads/1/3/1/3/131380531/lorozapalazimu-xoropoka-gutisibofilema.pdf
    • http://files.ficgn.org/uploads/1/3/1/8/131871433/afc31132be78.pdf
    • http://renibe.rambosiu.com/uploads/1/3/0/9/130969153/zinupevowit_gawodupiko_biravinije.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xagene.pdf
    • https://cdn.shopify.com/s/files/1/0432/8187/5112/files/weight_training_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/2828928491.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/zivagunogewakoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/2763/5096/files/11215592896.pdf
    • https://cdn.shopify.com/s/files/1/0430/6527/8625/files/mazekefekuvekuteronu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/31263235682.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/mofomagusitisom.pdf
    • https://cdn.shopify.com/s/files/1/0431/0607/4780/files/18259699231.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/39844712638.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_off00005847.bin
38f761b862c2929d33a66fca19322d7033a7834375374965cc2ed5719e91fcec
pdf-font-stream PDF embedded font (sfnt) at offset 0x5847 5032 bytes
font_01_sfnt_off00006972.bin
c32f4ed0429f9df69775b4b4881b6cac73fdbbbc565e1ad803406504323af17f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6972 10836 bytes