Malicious PDF — malware analysis report

Static analysis result for SHA-256 c24b00cb2e632d32…

MALICIOUS

PDF

61.4 KB Created: 2020-08-21 10:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da9813e9b45685946201495e6e6ae5d0 SHA-1: 830c78b86ad82119cb73e942a5af157545fee6d3 SHA-256: c24b00cb2e632d327ff57bbf2fee49501112f3aa3d9e77ccd780ec7ca3d6a01f
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=channel+4+news+reporters+columbus+ohio'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of the malicious URL is sufficient to determine the attack pattern.

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=channel+4+news+reporters+columbus+ohio
    • http://pewaruzu.jamesmower.com/uploads/1/3/0/8/130874359/suwuvon.pdf
    • http://files.eddingtonfirecompany.org/uploads/1/3/1/4/131453934/c6593545b1.pdf
    • http://jozara.dreamlandertours.com/uploads/1/3/2/7/132710507/1162571.pdf
    • http://files.westerhausmetals.com/uploads/1/3/1/4/131407281/tezirajitaxa.pdf
    • http://files.fireartsarcata.com/uploads/1/3/2/6/132695472/a06df4.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/96039253507.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/harbor_breeze_remote_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/census_2020_affairscloud.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/nokijuvox.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/mufibabozegiw.pdf
    • https://cdn.shopify.com/s/files/1/0447/9965/6087/files/boss_gt_100_manual_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0430/3421/4561/files/print_2d_array_java.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/rikikegitimagetapowiruw.pdf
    • https://cdn.shopify.com/s/files/1/0435/8442/2051/files/zajulenu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/bepuxirusevulogex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.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_off0000b0cf.bin
48862449fcc155a57d84880426d2f90aeda7877273ca818074cb6fec1c6b9aec
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0CF 5400 bytes
font_01_sfnt_off0000c30d.bin
a8609c5ca506cad5f96f749f77700034e97053206a8b29ec08c6d255edae506f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC30D 11092 bytes