Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e97e84b60c083a…

MALICIOUS

PDF

54.8 KB Created: 2020-07-29 16:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c32a416f7c9326bf3467a099cae3be0 SHA-1: 443f539f05638b543013f2ee0dfef683de6189d1 SHA-256: 00e97e84b60c083a35967b1de23eb2ecee0cd8a810814a21908990198164d8d1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, suggests a lure related to a 'calorimetry lab report'. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful 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=calorimetry+lab+report+pdf
    • http://files.theagileapprentice.co.uk/uploads/1/3/1/3/131380558/naderawoki_lunewujotopok.pdf
    • http://files.shilohlabradoodles.com/uploads/1/3/0/7/130776314/adc50b.pdf
    • http://files.smplyjohn.com/uploads/1/3/1/3/131384300/sijeb-besomenabewuz-mojegifogonesed.pdf
    • http://files.robindaviesconsulting.com/uploads/1/3/1/4/131453284/67e560624087.pdf
    • http://files.therealfoodcafe.com/uploads/1/3/0/9/130969097/cd4889.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/9214623420.pdf
    • https://cdn.shopify.com/s/files/1/0429/7093/9541/files/60587195713.pdf
    • https://cdn.shopify.com/s/files/1/0434/0042/9731/files/62989271329.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/titukovupegamusadoxidu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/54493959992.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/39035740003.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/21074888917.pdf
    • https://cdn.shopify.com/s/files/1/0439/2206/3515/files/80506146489.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6343/files/74505164681.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/41049783562.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/tijijajajir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d44.bin
45d0de13175a24ae0ae70831476ca396eee1cc09eed14f6a0d17b2fb13bb3e15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D44 4956 bytes
font_01_sfnt_off00009e29.bin
59cce2deb050f194d385946fdcc6421b917218ff7ae8eefc9346c3c8e578579f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E29 2356 bytes
font_02_sfnt_off0000a852.bin
c1565d5dd8d7adca6b2174e37bdb9cfe0934d228053e45601a146bdf74bb5106		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA852 10816 bytes

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