Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da3c42694105372…

MALICIOUS

PDF

45.0 KB Created: 2020-08-07 01:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa3744f37b0a65c239e8b04005e6aeae SHA-1: 64db152b938dd28d6c00c1bc352a8e6858533b5c SHA-256: 8da3c42694105372d85ad356241c2ae894acd9ec0dbef254d46a064c48e0855a
152 Risk Score

Malware Insights

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

The PDF contains numerous external links, including one pointing to a known malicious redirector at `ttraff.com`. The document body, though obfuscated, includes the URL `https://ttraff.com/pify?keyword=blender+character+rigging+pdf`, suggesting a lure to a phishing or malware distribution site. The presence of a link farm and a malicious redirector indicates a likely attempt to drive traffic to 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=blender+character+rigging+pdf
    • http://files.highpeaksadventureco.com/uploads/1/3/2/8/132815004/wabigoruwulekimoju.pdf
    • http://files.epicfuncenter.com/uploads/1/3/0/7/130775537/botivo.pdf
    • http://zagipa.shadesofthetropics.com/uploads/1/3/1/0/131070109/1c79791f55f.pdf
    • http://vidudodi.wanderingmusicians.com/uploads/1/3/1/0/131069934/rupis-gotikemuxonex-pezuzuv.pdf
    • http://files.larkinswag.com/uploads/1/3/1/0/131071043/4893095.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5221/files/bajinebalazagenefavuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/rapegajaworobofozipim.pdf
    • https://cdn.shopify.com/s/files/1/0428/8918/3398/files/39160651649.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/78633689872.pdf
    • https://cdn.shopify.com/s/files/1/0432/2315/4847/files/82325776208.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tipibag.pdf
    • https://cdn.shopify.com/s/files/1/0429/2945/5271/files/38908604700.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/dusafufarozisumam.pdf
    • https://cdn.shopify.com/s/files/1/0435/1927/9259/files/luladodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3785/9735/files/bobcat_s_130_specs.pdf
    • https://cdn.shopify.com/s/files/1/0439/8484/7006/files/list_of_forensic_files_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/pilot_aptitude_test.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_off000072cc.bin
e3cce0d5cad3772eab1954c8f5bdb8670ed567a8cd06141cd2c261dc1b02cab1
pdf-font-stream PDF embedded font (sfnt) at offset 0x72CC 5288 bytes
font_01_sfnt_off000084c8.bin
d2d9c46e8f7dcbef174ff364b3d008aac39ba218a5722aba5a69d69bc8327621
pdf-font-stream PDF embedded font (sfnt) at offset 0x84C8 10068 bytes