Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6b48367e7f9586…

MALICIOUS

PDF

43.5 KB Created: 2020-08-23 22:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb1e4fe9810fed4230b84b4da2dd24d2 SHA-1: d9735fa9d8862821b633be5a975ba0b61bb3db26 SHA-256: 4e6b48367e7f95867f2850149ba9a60a40b505557d5e1719b4d8a6f079ca9b05
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a Microsoft Excel activity log template. The document body, though heavily obfuscated, contains references to this lure. The presence of a mass external PDF link farm further indicates a malicious intent to distribute content through potentially compromised or 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/pify?keyword=microsoft+excel+activity+log+template
    • http://files.unicoloursb.com/uploads/1/3/1/6/131606111/5222175.pdf
    • http://files.dirtypawprintsaussies.com/uploads/1/3/0/7/130776104/basiluko.pdf
    • http://files.mrsventurasclass.com/uploads/1/3/1/3/131383383/3382278.pdf
    • http://files.hanaleispirits.com/uploads/1/3/0/7/130775701/vopokepek.pdf
    • http://files.hellohollowprintsland.com/uploads/1/3/1/8/131871650/rogajetu-ferejixuxofe-nisotuzav-vetidife.pdf
    • https://cdn.shopify.com/s/files/1/0453/8499/0888/files/betterave_sucrire.pdf
    • https://cdn.shopify.com/s/files/1/0435/6574/4287/files/benzodiazepinas_en_el_anciano.pdf
    • https://cdn.shopify.com/s/files/1/0446/9473/2953/files/descent_avernus.pdf
    • https://cdn.shopify.com/s/files/1/0437/2470/1847/files/holmesglen_apa_referencing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/9503/9905/files/jenkins_plugins_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6517/2387/files/sogonuwenefevexa.pdf
    • https://cdn.shopify.com/s/files/1/0449/7873/3224/files/capitaland_annual_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/0270/7616/files/gigiwovabinidirigileduxa.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_off00006b59.bin
5e4cc3e7bcfbf6622666f47cb9ba2e911b338700d4554aa60a15c76e377197de
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B59 5572 bytes
font_01_sfnt_off00007e4b.bin
3020da1e8bef8999c2c8f0605c2aee956cf449cacaf1b43e4f4d142979505aa2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4B 10228 bytes