Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f11c8e5e9df86e…

MALICIOUS

PDF

123.7 KB Created: 2020-08-10 12:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 823b8da822863ec443488384c5e6422e SHA-1: acfa9de449250b912657435ecea02452478e7243 SHA-256: 60f11c8e5e9df86e3552ae28fa32055cd11567aafead5c9979c4f3750dcf2723
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure related to TOEFL grammar skills, but the embedded link redirects to a known malicious domain, indicating a phishing or scam attempt. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' further supports this, suggesting a fraudulent scheme. While no scripts were explicitly extracted, the PDF structure and malicious link are strong indicators of a phishing attack.

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.ru/pify?keyword=building+grammar+skills+for+the+toefl+ibt+pdf
    • http://files.gileadtimber.com/uploads/1/3/1/6/131637307/c00967.pdf
    • http://files.zwolleloggersfest.com/uploads/1/3/1/8/131856129/b6dd03.pdf
    • http://files.humanpoem.com/uploads/1/3/0/7/130738765/ce7b9cea9869d.pdf
    • http://files.waterburyjunkremoval.com/uploads/1/3/0/7/130776498/posuwedutediji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/52219870985.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/loramepodidurikuzorigekud.pdf
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/catalyst_9200_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/dujolakovipude.pdf
    • https://cdn.shopify.com/s/files/1/0434/0324/7781/files/zujugesijatanitimidedofo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4164/2906/files/aplasia_medular_adquirida.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9165/files/engineering_statistics_5th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89965927340.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/klasifikasi_jamur_basidiomycota.pdf
    • https://cdn.shopify.com/s/files/1/0435/4228/2394/files/mojesedikikuboxubovukuvu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/36643445970.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_off000192a6.bin
a03c86dfa40932bcdd9a9844a95e2c75faef082a7d78c63a7fdab7a62abdd6f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x192A6 5588 bytes
font_01_sfnt_off0001a56a.bin
3a15e951918efceccf0f3b5f9b8ff8c890ab0ef10b27d99a086e455f4b8d1ead		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A56A 14168 bytes
font_02_sfnt_off0001d2ac.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2AC 4324 bytes

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