Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0f3acb2917ee04…

MALICIOUS

PDF

46.2 KB Created: 2020-08-11 04:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b78854bd83de3851ffec15319eba712 SHA-1: 0d25bf7d65d915f814f25c0068f2827a071039fa SHA-256: fc0f3acb2917ee042e4da734365d4834e6e69e4410607f0c71e51658f05477fd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'basic electronics pdf' and the URL 'https://ttraff.com/pify?keyword=basic+electronics+pdf+1st+sem', suggesting a lure to a phishing or malware distribution site. The presence of numerous external PDF links further indicates a link farm designed to manipulate search engine results or distribute content, with the primary redirector being the most concerning IOC.

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.com/pify?keyword=basic+electronics+pdf+1st+sem
    • http://files.jlkarchitecturaldesign.com/uploads/1/3/0/7/130775632/juwapenanidi.pdf
    • http://files.nokomispl.org/uploads/1/3/1/1/131164504/536f264d6e78b.pdf
    • http://files.pampangarealestate.com/uploads/1/3/0/7/130775634/tiwegimumuna-vovobowiwago-xijapofabuv-leludekowuzovef.pdf
    • http://files.prtesol.org/uploads/1/3/2/7/132710592/lodata.pdf
    • http://kemifas.judyadhdcoaching.com/uploads/1/3/1/4/131409090/1419329.pdf
    • https://cdn.shopify.com/s/files/1/0435/7714/7547/files/97544117836.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54440827626.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/assassin_s_creed_3_walkthrough_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9898/7941/files/idaho_511_road_reports.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/kasezizepipox.pdf
    • https://cdn.shopify.com/s/files/1/0431/0358/4423/files/56931093614.pdf
    • https://cdn.shopify.com/s/files/1/0436/1958/2110/files/bass_arpeggios.pdf
    • https://cdn.shopify.com/s/files/1/0435/1138/2170/files/alain_deneault_mediocrity.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kaxepetumikikexozifaxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67572949107.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/esl_beginner_placement_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/airlift_pump.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bb6.bin
b10dafbb9b34287d9f5d2f70ee60dc9538ff358a226eb70b3659589a7034c067		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB6 5404 bytes
font_01_sfnt_off00007df3.bin
bda55de62dbbebd2e503052d1f567ca65eeecab2637cab4f5c004cb35c90f1d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF3 14444 bytes

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