Malicious PDF — malware analysis report

Static analysis result for SHA-256 91e51e525f93598b…

MALICIOUS

PDF

52.1 KB Created: 2020-09-01 02:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5332500a6edfdcbf282ae7c8b48033c SHA-1: 25e3eb748ba96d60b43043117eb2779a10c593c8 SHA-256: 91e51e525f93598be80c66712715b67ed8d2581171d8a78ad2fb10827ebd5d9a
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure at 'https://ttraff.com/wix?keyword=build+guide+kennen+ap'. Another heuristic flags the PDF for containing a large number of external links, suggesting a link farm. The document body, though heavily obfuscated, contains text related to a 'build guide' and the authoring application 'wkhtmltopdf', which is often used to generate malicious PDFs. The presence of these elements strongly indicates a phishing or scam attempt designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=build+guide+kennen+ap
    • https://cdn.shopify.com/s/files/1/0430/9362/2935/files/dispute_debt_collector_credit_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/30663142782.pdf
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/powonizu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3077/files/lumixivibobarezuluxu.pdf
    • https://static.usrfiles.com/ugd/8e1900_f9e06e5ec9cd4076a7353a4f8f32c90c.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/fasevimas.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/jipotefuzatudaligejejoba.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/pectus_chest_deformity.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8994/files/16296194255.pdf
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/xaxegenezitakogewatos.pdf
    • https://cdn.shopify.com/s/files/1/0428/6405/0332/files/new_odia_song_dj_2019.pdf
    • https://cdn.shopify.com/s/files/1/0428/7568/2972/files/bhojpuri_video_hd_mp4_2019.pdf
    • https://cdn.shopify.com/s/files/1/0434/2569/3845/files/casting_crowns_only_jesus_chords.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/gixifajoxemaz.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_off00007feb.bin
e87243c9d3e36a2210bb2e81d8a5489b2b5830c1f5b7e76fbd6be78c6fcef645		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEB 4968 bytes
font_01_sfnt_off000090ec.bin
885b6c97b939de2ff7de701d24548358f425d06abc284951ddd6510b0a528e28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90EC 16436 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.