Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da5a4a6fa4490da…

MALICIOUS

PDF

87.0 KB Created: 2020-08-06 20:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b76b8ec480782b412e97443edfbce6b2 SHA-1: a151edb4325c98242fd393cc035b0789e2ea98a0 SHA-256: 8da5a4a6fa4490dab1a29b48e5c30555f9c5dfa62e9dcede4231e40fb0be4b41
150 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 'ttraff.com'. This URL is presented within the document body, disguised as a legitimate PDF download. The presence of numerous other links to Shopify domains suggests an attempt to obscure the malicious destination through a link farm. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=strategic+marketing+process+pdf
    • http://files.prairiefix.com/uploads/1/3/0/7/130776204/71b94be8ea.pdf
    • http://files.group-wb.com/uploads/1/3/1/3/131380625/bogugefujowe_wejugomazu.pdf
    • http://files.movieblahblah.com/uploads/1/3/0/8/130874347/rewutur.pdf
    • http://files.clairescraftsonline.co.uk/uploads/1/3/1/3/131379174/b8544.pdf
    • http://files.mcfieldhockey.net/uploads/1/3/1/4/131437984/d41805db.pdf
    • http://files.movieblahblah.com/uploads/1/3/0/8/130874
    • https://cdn.shopify.com/s/files/1/0440/9524/2392/files/75058739005.pdf
    • https://cdn.shopify.com/s/files/1/0433/5108/1114/files/71092720438.pdf
    • https://cdn.shopify.com/s/files/1/0433/4541/2245/files/rotation_matrix_3d.pdf
    • https://cdn.shopify.com/s/files/1/0432/4950/0315/files/roxojiwiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/muxazuwefinijosakefokum.pdf
    • https://cdn.shopify.com/s/files/1/0436/1561/7182/files/navy_jobs_2020_advertisement.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/43561010950.pdf
    • https://cdn.shopify.com/s/files/1/0436/8980/3941/files/wasteland_survival_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/wobazi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/almost_increasing_sequence_codefights.pdf
    • https://cdn.shopify.com/s/files/1/0435/5132/6371/files/zumogerivererasaw.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_off0001096b.bin
a66f75b1e1074c2e133f2bf718437f346eebcf55b49faa75267c928dcfc905d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1096B 5400 bytes
font_01_sfnt_off00011ba3.bin
c381edd5d0f944d8f2f01b8fd2da6191f3c51ec13413a0c2589a4010fba9de62
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA3 10652 bytes
font_02_sfnt_off00014003.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x14003 4324 bytes