Malicious PDF — malware analysis report

Static analysis result for SHA-256 29cb5b814640d59a…

MALICIOUS

PDF

51.5 KB Created: 2020-08-21 12:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d4a94937349428f3134c859de80052c SHA-1: d820977be1462499a13f83ade1e71ee06d84170f SHA-256: 29cb5b814640d59aabaf4d353a26c2170ff6c014f93c96d3310c5b1f0d50975a
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=bharaate+song++free, which is presented as a lure for a free song. The PDF also contains a large number of embedded links, flagged by PDF_SEO_LINK_FARM, with many pointing to Shopify domains, likely to obscure the malicious redirector.

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/pify?keyword=bharaate+song++free
    • http://files.mrstrizz.com/uploads/1/3/0/8/130813042/xekamat.pdf
    • http://paxajupo.caffe-pagato.com/uploads/1/3/2/6/132682787/pejakumogoxu_xikewon.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1547/files/senior_rater_comments.pdf
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/mekidesijozozub.pdf
    • https://cdn.shopify.com/s/files/1/0431/5175/3380/files/cheetah_3d_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/4286/4289/files/47131383688.pdf
    • https://cdn.shopify.com/s/files/1/0432/9639/1323/files/zonolubonoxixotene.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/nusatanatixosebimogizun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99237037604.pdf
    • https://cdn.shopify.com/s/files/1/0435/9307/2808/files/mechanics_of_materials_7th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/siwubevisafuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/todefolonud.pdf
    • https://cdn.shopify.com/s/files/1/0438/4358/4162/files/anyplace_control_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zetelonum.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/scope_resolution_operator.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/
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/file

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000842f.bin
f437a83449c99a7d4d129ca0b7fbe5d652de7c6ca66e0f44ad46dd1e21a130b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x842F 5048 bytes
font_01_sfnt_off0000955c.bin
05a6f1c3c9f3c1bba07b44933da765cfbb5679beda51288426f98017720c5b55
pdf-font-stream PDF embedded font (sfnt) at offset 0x955C 13896 bytes