Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea7a7e55a8c88c1…

MALICIOUS

PDF

45.3 KB Created: 2020-08-07 20:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d64becb5bf901faf30f9bf054a88648e SHA-1: 766586ff921fea115f88c937e70e38b7d44f484a SHA-256: cea7a7e55a8c88c1439d53bc8e32388d6e31743c7ccc2d0e856324901994f1f8
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=mba+cet+result+2020+download+pdf'. This link is presented within the document body, disguised as a download for "Mba cet result 2020 download pdf". The document also features a PDF link farm, with many links pointing to Shopify domains, but the primary malicious intent appears to be the redirector. No scripts were extracted, but the presence of the malicious redirector and the SEO link farm suggests a phishing or scam attempt.

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=mba+cet+result+2020+download+pdf
    • http://files.thatmusicdogkid.com/uploads/1/3/1/4/131483097/a3aa2d3b2f.pdf
    • http://files.hellofromdetroit.com/uploads/1/3/0/8/130814229/fizugapurider.pdf
    • http://files.sharonlewis.net/uploads/1/3/2/6/132680974/58bcca31f2db80b.pdf
    • https://cdn.shopify.com/s/files/1/0447/6128/4757/files/cv_maker_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/5978/1538/files/96593924853.pdf
    • https://cdn.shopify.com/s/files/1/0438/4840/1046/files/14060787057.pdf
    • https://cdn.shopify.com/s/files/1/0431/4690/3701/files/5620148646.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/xuweg.pdf
    • https://cdn.shopify.com/s/files/1/0438/6720/9893/files/difference_between_inward_and_outward_radial_flow_turbine.pdf
    • https://cdn.shopify.com/s/files/1/0431/6787/5221/files/bnp_paribas_mutual_fund_redemption_form.pdf
    • https://cdn.shopify.com/s/files/1/0440/2901/8262/files/74690740261.pdf
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/tagafofopapovenelolixejun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.pdf
    • https://cdn.shopify.com/s/files/1/0433/3371/4070/files/59829320608.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/xuxupivuseloluvolawidobuz.pdf
    • https://cdn.shopify.com/s/files/1/0450/1697/3476/files/business_intelligence_tools_for_excel_analysts.pdf
    • https://cdn.shopify.com/s/files/1/0428/7712/4764/files/bokadelanamajotitegeled.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_off000067ec.bin
f711ed1c8fb056bb0dd628f5fe928545bb5898ce1e9c3e100c2dd4ebd5b0ba5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EC 5660 bytes
font_01_sfnt_off00007b54.bin
9e8b50eccd60baf9d510e72f298c09ae26d0ff812104745b80337b56b7f56c64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B54 14576 bytes

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