Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e477af45cd0617e…

MALICIOUS

PDF

48.9 KB Created: 2020-08-04 21:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0980d57231c7907273a0888f2e2491e0 SHA-1: bd395fa267d0c00b83294d6ff1e7fe31e87adc0c SHA-256: 8e477af45cd0617ebf383ed2a24078b54de7c9bdc03e2c74708be23f2534f78d
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially corrupted, contains the URL 'https://ttraff.com/pify?keyword=eu+gmp+annex+1+pdf', which is flagged as a malicious redirector. Additionally, a large number of external PDF links were found, suggesting a link farm for SEO manipulation or to distribute further 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=eu+gmp+annex+1+pdf
    • http://files.wordfestbucharest.com/uploads/1/3/2/3/132302764/d0e007c85.pdf
    • http://files.inlandmetalcrafts.com/uploads/1/3/1/8/131871704/dc179ba94b233.pdf
    • http://files.quapawcattlecompanystore.com/uploads/1/3/1/4/131453267/8f4c36196.pdf
    • http://dakakaxi.thewaveinspired.com/uploads/1/3/0/7/130775219/kowavolavad-gawiwelepoledo-fikufufep.pdf
    • https://cdn.shopify.com/s/files/1/0430/5738/1530/files/63928771473.pdf
    • https://cdn.shopify.com/s/files/1/0437/8741/9805/files/freeminecraft_gift_codes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6820/2901/files/47124938186.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2852/files/13306064524.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1700/files/architecture_articles_for_students.pdf
    • https://cdn.shopify.com/s/files/1/0434/3375/4773/files/c_read_csv.pdf
    • https://cdn.shopify.com/s/files/1/0435/4359/3109/files/perdagangan_manusia.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdf
    • https://cdn.shopify.com/s/files/1/0435/7432/9507/files/eken_h9r_firmware.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88065476392.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/graph_paper_a4.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_off0000810b.bin
c1b0f8971cecb046b143cd36d4ac1329f78d6842e9c56c2f5174ef1eebdc0717
pdf-font-stream PDF embedded font (sfnt) at offset 0x810B 5132 bytes
font_01_sfnt_off00009289.bin
3c0bdc48eac3928f851a7e5b70faef19dcc6ceca362a76997e29c77d1709118e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9289 10668 bytes