Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a142dabde12d45…

MALICIOUS

PDF

50.0 KB Created: 2020-08-30 06:39:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 533f545259d6320b15cf598f9a2ffcd8 SHA-1: 76b7821b41a1c51308124cfa4623ad5d93fa4306 SHA-256: 01a142dabde12d45e02171b7f011169674aa7861f8bc3b2dfae7a757e1d36386
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to benign-looking PDF files hosted on CDNs and Shopify. However, one critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=what+the+bagel+man+saw'. This suggests the document is part of a link farm or SEO poisoning campaign designed to lure users 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.cc/wix?keyword=what+the+bagel+man+saw
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/12f4eb_8449c701a7b54dd09f3a4b7f9190828b.pdf
    • https://static.usrfiles.com/ugd/dc98cc_8870c04c48da4684b1a064fa2bc035de.pdf
    • https://static.usrfiles.com/ugd/4dd980_053f69652eb6449f86cce74aca6f4e37.pdf
    • https://static.usrfiles.com/ugd/6cf392_f3b8ecb33a254ed7ae98f580d9463f30.pdf
    • https://static.usrfiles.com/ugd/f96b02_02bb710685df4e4587659be0c349bbae.pdf
    • https://cdn.shopify.com/s/files/1/0428/3010/2694/files/xelilidedovuzikorovu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2117/9802/files/53461939393.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/vegetarian_ketogenic_diet_food_list.pdf
    • https://cdn.shopify.com/s/files/1/0454/7497/1800/files/57519442164.pdf
    • https://cdn.shopify.com/s/files/1/0443/5014/4668/files/80998426423.pdf
    • https://cdn.shopify.com/s/files/1/0446/3286/6979/files/olivier_blanchard_macroeconomics_free.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_off000079b5.bin
948c90960dac72593fbbaa7aaed71f8069018407194d1065e7bcd4b57b297431
pdf-font-stream PDF embedded font (sfnt) at offset 0x79B5 4880 bytes
font_01_sfnt_off00008a3a.bin
84044d238cd710ad70d11c8f7fe674f6efc4a8aa4b69865e83e99367e86d99de
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3A 10288 bytes
font_02_sfnt_off0000ad74.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD74 4324 bytes