Malicious PDF — malware analysis report

Static analysis result for SHA-256 809328789f1d03d6…

MALICIOUS

PDF

60.7 KB Created: 2020-08-21 23:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ffc8cc4e9c74d65707c3b7d366dd554 SHA-1: 127f57a2d6d306e6c918223f00e854e286187aa4 SHA-256: 809328789f1d03d6d552429c464e8c4791c0f42be45e55de2e25e24f66d8b81a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=murottal+al+kahfi+ayat+1-+10', is flagged as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to direct users to malicious sites.

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.cc/pify?keyword=murottal+al+kahfi+ayat+1-+10
    • http://files.saltwaterstudios.co.uk/uploads/1/3/2/6/132682685/sexagezamifad.pdf
    • http://files.coffeejon.biz/uploads/1/3/0/9/130969934/pagifewewevabal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/asma_cardiaca.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/15448421857.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5265/files/fatati.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6939/files/fomaguxirivus.pdf
    • https://cdn.shopify.com/s/files/1/0432/9209/8724/files/asymptotic_analysis_and_perturbation_theory.pdf
    • https://cdn.shopify.com/s/files/1/0432/2466/2173/files/bakip.pdf
    • https://cdn.shopify.com/s/files/1/0434/5767/5431/files/introduction_to_machine_learning_with_python_o_reilly.pdf
    • https://cdn.shopify.com/s/files/1/0462/0088/1315/files/tisaleta.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/futikuzazojexopuvenewipu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/vogefopizo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6782/4533/files/32691803972.pdf
    • https://cdn.shopify.com/s/files/1/0429/6245/2643/files/arithmetic_and_geometric_series_word_problems_with_answers.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000b0ed.bin
c898e5284e58c929694835bb9802fb7693d4223a8367515e39de90d2a1619fb4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB0ED 28732 bytes
font_00_sfnt_off00007cb3.bin
efa4a0e734eef63cb6ee22351ed4272c2f9e9631332a406cc262e207120b2799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB3 5076 bytes
font_01_sfnt_off00008e0e.bin
3380648157d03654ca8cc336b5de6027fbb0271f63b586cb9252974a804b3a23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0E 10120 bytes

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