Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54a93b2ac592d6c…

MALICIOUS

PDF

42.3 KB Created: 2020-08-24 11:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 097f541f81f1f7e1db5fefde9c043cdc SHA-1: 73b4cc178313b13b23a9c8ab1eb635e4159e05be SHA-256: d54a93b2ac592d6caeac2c1f942e9b98e8b9555c89e0e8623a6cc5ab275f6862
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain (ttraff.com), indicating a phishing or redirection attempt. The document body, though partially corrupted, suggests a lure related to a worksheet, likely to entice clicks. The presence of numerous external PDF links, many hosted on Shopify, further supports a link farm or redirection strategy. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer a malicious redirection attack.

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=identifying+opposite+adjacent+and+hypotenuse+worksheet+answers
    • http://divobe.carlukecollies.com/uploads/1/3/1/4/131406665/8906425.pdf
    • http://rasiz.laurellesparks.com/uploads/1/3/1/3/131398101/8454425.pdf
    • https://cdn.shopify.com/s/files/1/0440/0922/6398/files/free_antivirus_for_iphone_7.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/leremepi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5559/6198/files/kadudak.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0423/files/spectrum_analyzer_theory_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/25699169950.pdf
    • https://cdn.shopify.com/s/files/1/0436/3019/8937/files/68410921400.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/2287125341.pdf
    • https://cdn.shopify.com/s/files/1/0432/3042/9346/files/wosevadepopini.pdf
    • https://cdn.shopify.com/s/files/1/0457/8974/1222/files/gimaxexevegotij.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/romodefagulixeti.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_off00005d69.bin
c05f718d338f1dd95d610284813ae15d41188b7a3fc93e4f838c496a132a3f2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D69 5656 bytes
font_01_sfnt_off000070bc.bin
39ad00a779059eeab4211e99f74da8dc2c7f1ec047d26e49fe8b29236df0c9a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x70BC 13540 bytes