Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e6548c73710eec…

MALICIOUS

PDF

53.8 KB Created: 2020-08-21 20:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31e2249c47b3b6f216287785e8ed9c89 SHA-1: 2265069484ccea955253bc02007235a6b35b0d10 SHA-256: d5e6548c73710eecb9f934a9aa9446bd84fd1236d276bd4438012862d119a5a4
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. This suggests the document is designed to lure users to malicious sites. The ML classifier strongly supports the malicious verdict.

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=triple+bottom+line+concept+pdf
    • http://pubuso.tradeharbor.org/uploads/1/3/0/7/130776330/1185454.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/viruxirekosarobavogerij.pdf
    • https://cdn.shopify.com/s/files/1/0451/1091/9321/files/fivenunilimunemabunetenom.pdf
    • https://cdn.shopify.com/s/files/1/0438/3594/9218/files/bozebawekunebetikelow.pdf
    • https://cdn.shopify.com/s/files/1/0433/4528/1183/files/dujazoxepinumuvulidolibe.pdf
    • https://cdn.shopify.com/s/files/1/0446/4692/4451/files/computer_networks_basics_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3357/files/74792992386.pdf
    • https://cdn.shopify.com/s/files/1/0434/2421/9293/files/gidovaluxogixajuni.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/tazudumiwisidugolexi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/calibration_curve.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_off00009686.bin
a74d083b2318b75fd9ecd3226bc16386e2376f8cd374ad9cdcca22ee6efb4649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9686 5004 bytes
font_01_sfnt_off0000a765.bin
a53c0908caee3956963e72603358c2d158c0f6dd2d7ce0d792568fc6937fafad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA765 10336 bytes

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