Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bfbb8fe605f4eed…

MALICIOUS

PDF

38.5 KB Created: 2020-08-29 23:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d871af264611cf0049e2f2575e4e1353 SHA-1: d3ee3e908a9554b1540faed6bb2d482b3b035fc4 SHA-256: 5bfbb8fe605f4eede3943275e392bf2654baf1dc080b7f31b2d39c633cafb6d5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains but are presented with titles suggesting book downloads. One prominent link, 'https://ttraff.com/wix?keyword=read+diary+of+a+wimpy+kid+double+down+pdf', is flagged as a malicious redirector. This suggests the document is part of an SEO poisoning or link farm scheme designed to drive traffic to malicious sites.

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/wix?keyword=read+diary+of+a+wimpy+kid+double+down+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6573/7370/files/48998306803.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/pdf_file_unlocker_tool.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/tofixaleduropopiminelixu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0993/2440/files/pemetatutixifazupewusi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1542/files/11289829199.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/jasmine-_reporters_protractor_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6840/files/26633737284.pdf
    • https://static.usrfiles.com/ugd/b8c837_d72b41df5afd49369f67247cd0d2f3fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bb2cf143de4431291f4a0972526255d.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_off00005861.bin
23c68d1815be98c4b0a52162d97446afaa5bb16595d1aa112899bf993d7f914e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5861 5412 bytes
font_01_sfnt_off00006ad0.bin
7afd15f5c527da85b411933ecae744e0c0c05988ceaa0f43cf562f6c1315a790		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD0 10196 bytes

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