Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eed6237d53a6fac…

MALICIOUS

PDF

38.0 KB Created: 2020-08-29 21:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54991a496ca30426c4753f487ae2b69a SHA-1: f88dfa9b73126eb87a993496664bf8ff17d49341 SHA-256: 0eed6237d53a6fac01eca83cce4eca2295b6eed639c16af0e38a60f20261cff6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=cambridge+grammar+of+english+carter+pdf'. The document also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. While no scripts were directly extracted, the presence of embedded URLs and the malicious redirector strongly suggest an attempt to direct users to malicious content, likely for phishing or malware delivery.

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.cc/wix?keyword=cambridge+grammar+of+english+carter+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/bivefamerona.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/sijinorosoxozutafebosidig.pdf
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/nunoni.pdf
    • https://cdn.shopify.com/s/files/1/0439/9782/3134/files/63057638784.pdf
    • https://cdn.shopify.com/s/files/1/0435/7062/6723/files/impact_of_google_search_engine.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/rodaguvufanirigum.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/59005639793.pdf
    • https://cdn.shopify.com/s/files/1/0437/2421/0326/files/89645549720.pdf
    • https://cdn.shopify.com/s/files/1/0432/1368/4891/files/99132861073.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30151397197.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3264/8602/files/a4_brochure_template_illustrator.pdf
    • https://cdn.shopify.com/s/files/1/0438/0871/9005/files/tikitu.pdf
    • https://cdn.shopify.com/s/files/1/0439/1505/1163/files/45690613762.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048b4.bin
e8b7ffc745d7fc54291f3bbcf02c2e6e377e82a59697c227dfdfcb5c81e764c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48B4 5520 bytes
font_01_sfnt_off00005b47.bin
80d065057b9515d976cb0abe55295d2ba874046d05a3850090017fea083f87f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B47 9828 bytes
font_02_sfnt_off00007cf3.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF3 4324 bytes

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