Malicious PDF — malware analysis report

Static analysis result for SHA-256 6538344980402b15…

MALICIOUS

PDF

87.2 KB Created: 2020-08-11 18:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cc2dc9586c60b43bd4b5d372b4a15e3 SHA-1: 35c48bf0ce8d51afc35e3169163195644d2750ac SHA-256: 6538344980402b15409c045b493d248428e65858f45f32ad03e9c1d51b7a1b23
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific URL pointing to a redirector, indicating a phishing or scam attempt. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to defraud users by promising valuable content like exam kits in exchange for a fee or further interaction. The presence of numerous external links, many hosted on Shopify, further supports the link farm characteristic of SEO-based scamming operations.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=acca+f5+kaplan+exam+kit+pdf
    • http://files.2spoiledpups.com/uploads/1/3/0/8/130873708/bupigel-rumagodato-kupami-tijivumo.pdf
    • http://dadan.inglesespecializado.com/uploads/1/3/0/8/130814328/4840430.pdf
    • http://files.majoringinfiber.com/uploads/1/3/2/7/132740978/c19e7e067a4852.pdf
    • http://files.ricballroom.com/uploads/1/3/1/3/131398419/bonikugotunupoberoj.pdf
    • http://files.tantricshadowcoaching.com/uploads/1/3/1/3/131379532/4485095.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gizazuvolabemonixodokij.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/craigs_list_kitsap_county_wa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7584/files/5335640475.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/kuzujaxodafowimot.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/jakuvabarasos.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/business_partnership_agreement_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3290/3833/files/65725805256.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/fananunupamawolutu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/salient_features_of_banking_regulation_act_1949.pdf
    • https://cdn.shopify.com/s/files/1/0428/6906/3836/files/75209925942.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9237/files/converting_pptx_to.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9393/files/44418093024.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3619/files/pitched_roof_construction_details.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_off000117fa.bin
dca618cb6553eb256072300f0dcec2de991d168fa614d4f18cf7a067b3827e56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117FA 5272 bytes
font_01_sfnt_off000129e0.bin
1454a60f1cd380f6ce600ff2b82939b23f23056732f5fe7b9ad4ed1010157f06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129E0 11068 bytes

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