Malicious PDF — malware analysis report

Static analysis result for SHA-256 e50aebeb1d2bfd95…

MALICIOUS

PDF

44.5 KB Created: 2020-08-23 12:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdd70da307e0ef3a3ae2db4896019eee SHA-1: 6f0a7d5c4ab060a477f08e1a65965bb6caa5a8b1 SHA-256: e50aebeb1d2bfd95aed500766a3c2f51d1bdcd28090c4030248c941565081974
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=aha+2019+poster+guidelines'. This URL is likely part of a phishing or scam campaign. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which host benign content but serve to obscure the malicious redirect. No scripts were extracted, but the presence of the malicious URL is sufficient evidence of malicious intent.

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=aha+2019+poster+guidelines
    • http://files.laroccamiahouse.com/uploads/1/3/2/7/132740463/b95f80f.pdf
    • http://files.stereosight.net/uploads/1/3/2/8/132815178/5859.pdf
    • http://files.wicknsudsbydino.com/uploads/1/3/1/4/131455903/norapamolupivuf.pdf
    • http://files.startseminars.com/uploads/1/3/1/8/131871980/7592553.pdf
    • https://cdn.shopify.com/s/files/1/0434/0652/4566/files/earthbound_nintendo_player_s_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/1092/4437/files/max_heap_python.pdf
    • https://cdn.shopify.com/s/files/1/0432/4098/0643/files/quadratic_equation_worksheet_grade_10.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/40208291606.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/90221325465.pdf
    • https://cdn.shopify.com/s/files/1/0437/1942/6197/files/calculus_early_transcendentals_10th_edition_anton_bivens_davis.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/cp_company_hat_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/3952/1958/files/54957984276.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006130.bin
7b3b3d6c525790700d4deccb91bf317f4a977a6de7fd6c1f5a48be013bdb776c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6130 5572 bytes
font_01_sfnt_off0000741d.bin
cb122b8b89ec3a8f5e1902bc922263402c690e8c99bee7b92aaa577d19dec8f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x741D 10324 bytes
font_02_sfnt_off0000976c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x976C 4324 bytes