Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f135c821dda6e84…

MALICIOUS

PDF

74.5 KB Created: 2020-08-20 05:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bbebb6681982bf8fd9851c7b2ba2f61 SHA-1: 85369878eba89ae790b8536c5ebf53d3d1fc8b75 SHA-256: 6f135c821dda6e843c6112f9b3ad49f9d919e5bbbd3a6991b85f60def29d8825
194 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a malicious redirector and an advance-fee scam lure, presenting language related to lotteries and parcel delivery. It embeds numerous links, with one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is likely intended to lead the user to a malicious site. No scripts were extracted, but the overall structure and embedded links strongly suggest a phishing or scam attempt.

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=jodha+akbar+movie+video+songs+free
    • http://files.rejoicewithin.com/uploads/1/3/1/4/131406885/764254.pdf
    • http://files.islandofsalvationbotanica.com/uploads/1/3/1/4/131437306/2492541.pdf
    • http://babiledi.aspireimmigration.ca/uploads/1/3/2/7/132741389/8147843.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7755/8681/files/36092486312.pdf
    • https://cdn.shopify.com/s/files/1/0437/2388/2664/files/mivig.pdf
    • https://cdn.shopify.com/s/files/1/0430/6586/8437/files/xogumofozozur.pdf
    • https://cdn.shopify.com/s/files/1/0440/8449/4488/files/pathogenesis_of_bacteria.pdf
    • https://cdn.shopify.com/s/files/1/0432/4029/2520/files/pesopiwumun.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8555/files/12897115637.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/ib_chemistry_sl_textbook_pearson.pdf
    • https://cdn.shopify.com/s/files/1/0434/4489/5909/files/fender_bass_tuner_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/modern_elementary_statistics_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0448/9353/6423/files/kosowuluxa.pdf
    • https://cdn.shopify.com/s/files/1/0447/8982/5687/files/hospital_and_clinical_pharmacy_practical_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4014/4534/files/57065307450.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfcd.bin
574187cd74c11352a0fe034736fe0cc1f2af61c97426d1a0a1937ea20b6298ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCD 5540 bytes
font_01_sfnt_off0000e28f.bin
6b4dfa9719e309c67b9bba13acd0624b575e7418c0b2e8e30cebdda1cd855b00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE28F 10652 bytes
font_02_sfnt_off00010732.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10732 16164 bytes

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