Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a74af4c3252d7b0…

MALICIOUS

PDF

43.5 KB Created: 2020-08-22 08:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a330ca1711cada1354f6fe93081abf5a SHA-1: 04ba839bea49bbb52beb45b3f5fe5162dc25a83c SHA-256: 0a74af4c3252d7b0f01c23ea1ab05866f59b81d4a26592009b3aef310ed5ec95
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure related to payment or bank details, directing the user to click a link. This link, 'https://ttraff.cc/pify?keyword=t%25E1%25BA%25A3i+army+2+l%25E1%25BA%25ADu+cho+android', is flagged as malicious and likely leads to a second-stage payload or phishing page. The document also hosts a large number of other PDF links, suggesting a link farm or SEO poisoning attempt to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.cc/pify?keyword=t%25E1%25BA%25A3i+army+2+l%25E1%25BA%25ADu+cho+android
    • http://nuzodape.jjohnsonartist.com/uploads/1/3/1/6/131606295/cd7dd.pdf
    • http://files.steamsupply.com/uploads/1/3/1/6/131636946/mimujanebije_veboj_dorore_dakisulorap.pdf
    • http://files.heartlandchurchnetwork.org/uploads/1/3/2/8/132814387/a72f5b06681.pdf
    • http://files.anniescandy.com/uploads/1/3/1/4/131437427/gejulomuwapibufavik.pdf
    • http://files.bernardramsdale.com/uploads/1/3/1/0/131070523/guzazixuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdf
    • https://cdn.shopify.com/s/files/1/0430/9195/1769/files/mvn_skip_tests.pdf
    • https://cdn.shopify.com/s/files/1/0429/1549/6092/files/70918193409.pdf
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/bimevodavajip.pdf
    • https://cdn.shopify.com/s/files/1/0428/1060/5735/files/69118584269.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4309/files/aguner_poroshmoni_song.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/34110288751.pdf
    • https://cdn.shopify.com/s/files/1/0436/9835/6392/files/6686117418.pdf
    • https://cdn.shopify.com/s/files/1/0433/2254/0185/files/88597553933.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9751/files/simple_personal_budget_template.pdf
    • https://cdn.shopify.com/s/files/1/0439/2668/3816/files/cardiac_catheterization_technique.pdf
    • https://cdn.shopify.com/s/files/1/0435/7485/3793/files/muzica_romaneasca_2013_noua_mp3.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067f3.bin
51b9c926c2bcd449a32193ec8cc6bf56f9a41f1c040a03bc89790aa5ee5f98d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F3 5708 bytes
font_01_sfnt_off00007a13.bin
8ce86aff4c07790d14a25593844c71428bcbb5495ec7bfa3081b92107d614df2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A13 11240 bytes

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