Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e83bd2fdc005f0…

MALICIOUS

PDF

55.9 KB Created: 2020-08-07 05:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3d68d08163209796becfe91bb341116 SHA-1: 583c7d1bd679e3d01064ddf317f1217a2068b9f2 SHA-256: 36e83bd2fdc005f0c19ded665518aaaa9df1add311525d2adaab93ce528c2b90
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a prominent link to 'ttraff.com', identified as a malicious redirector. The document body, though heavily obfuscated, contains the same URL. This suggests the primary purpose is to trick the user into visiting a malicious site, likely for further exploitation or credential harvesting. The PDF also hosts a large number of external links, many pointing to Shopify, which is characteristic of SEO-based link farms used to artificially inflate search rankings for malicious content.

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=halloween+color+by+number+pdf
    • http://files.rustedacresoaps.com/uploads/1/3/1/4/131407061/0b21d33e6b85.pdf
    • http://files.petcremationcare.ca/uploads/1/3/0/7/130775431/famamaropomizid.pdf
    • http://files.sprocket-theatre.com/uploads/1/3/2/8/132816066/94b3b40c.pdf
    • https://cdn.shopify.com/s/files/1/0440/6276/9302/files/11243172177.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3334/files/tozakaxurejoguv.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8994/files/15530165622.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5808/files/94046317040.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gifowugebivagobawogun.pdf
    • https://cdn.shopify.com/s/files/1/0447/8740/0864/files/new_antidiabetic_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/11171485744.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/32493249900.pdf
    • https://cdn.shopify.com/s/files/1/0432/3105/1943/files/pujalajoliwamizo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/21556885751.pdf
    • https://cdn.shopify.com/s/files/1/0433/6920/1832/files/zanedapisamo.pdf
    • https://cdn.shopify.com/s/files/1/0445/5740/2276/files/80476494376.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/95458176397.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_off0000936d.bin
1bb9e08267869d203418632e1e09107f95c85fcc4618673a8b14625b7ba49a83
pdf-font-stream PDF embedded font (sfnt) at offset 0x936D 5416 bytes
font_01_sfnt_off0000a5d6.bin
1d082855cd7c0755172baaf4600d1f2b21d1c2da43214e0c9f90b2d261d96734
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5D6 14012 bytes