Malicious PDF — malware analysis report

Static analysis result for SHA-256 102598e7e729ef09…

MALICIOUS

PDF

37.2 KB Created: 2020-08-31 08:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c55530f5a4b1515e6c17004478b5a5d SHA-1: 4e779c8ccec7999d9a0a6eed39851185130fed8a SHA-256: 102598e7e729ef09164c0e275dec362180dc276c62666b48d91d9542a5a068cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The presence of a malicious redirector URL suggests an attempt to lead the user to malicious content or a phishing 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.link/wix?keyword=shauna+sand+antoine+berlier
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/pusijugavigijijasafagila.pdf
    • https://cdn.shopify.com/s/files/1/0438/2982/1600/files/12427603298.pdf
    • https://cdn.shopify.com/s/files/1/0463/4925/4817/files/zujoxosesudoguvol.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0957/files/vunosaxima.pdf
    • https://cdn.shopify.com/s/files/1/0438/5167/7856/files/54390999882.pdf
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/awg_wire_size_chart.pdf
    • https://cdn.shopify.com/s/files/1/0440/6408/0024/files/zamofusugoxunurulese.pdf
    • https://cdn.shopify.com/s/files/1/0431/5516/1252/files/fufejolepiwi.pdf
    • https://static.usrfiles.com/ugd/1b8612_b8b99da39a5a4e2f825ade5f1aa03f48.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdacf10884604719b5fe5f97e6c3203c.pdf
    • https://static.usrfiles.com/ugd/8b2c09_093a3566045846d2943bfbc9d53a22d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_867dfd62903a4df59efb9f9b30a9b231.pdf
    • https://static.usrfiles.com/ugd/ea78e0_f12cf935249a4eaa825e5f91198b8149.pdf
    • https://static.usrfiles.com/ugd/b3bc21_5673da6873b14dbf8a12672b038e0c28.pdf
    • https://static.usrfiles.com/ugd/b88e3d_319f603ec3c149628a6e65ea1f6b65e1.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053c8.bin
c5c293b260ea331a3c08a1fa40e3794a4e71567c5d0cb4a8653dc105a48b1efd
pdf-font-stream PDF embedded font (sfnt) at offset 0x53C8 5156 bytes
font_01_sfnt_off00006532.bin
3b3cc6b043ea43b1af60d0c8d61037a651075c195dc2af74034423925b1380ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x6532 10200 bytes