Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5eea87438906a4d…

MALICIOUS

PDF

55.6 KB Created: 2020-08-26 12:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 389fbd2587aeff21fdcf7c9b7fd97ea0 SHA-1: afc4117f33b6d43ae4ff82e076eda202692ff894 SHA-256: f5eea87438906a4d0bd90ea630f4749986091ac862e509b8f87eaeb1535194b5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that are part of a link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Dungeons and dragons 2e player's handbook pdf' and the malicious URL, suggesting a lure to download a fake PDF. The ML classifier strongly indicates maliciousness.

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.ru/pify?keyword=dungeons+and+dragons+2e+player%2527s+handbook+pdf
    • http://files.criminallawyermissouri.com/uploads/1/3/0/7/130775953/df7ef73a58c0.pdf
    • http://files.staffordengines.com/uploads/1/3/2/6/132695329/5450683.pdf
    • http://pimunid.kgreggartist.com/uploads/1/3/1/4/131408439/8028624.pdf
    • http://files.wecreatestars.com/uploads/1/3/1/4/131407968/wezaragugobox.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3671/files/31683872890.pdf
    • https://cdn.shopify.com/s/files/1/0437/3171/4199/files/40482727237.pdf
    • https://cdn.shopify.com/s/files/1/0431/3035/5866/files/vaputifawolipeboso.pdf
    • https://cdn.shopify.com/s/files/1/0429/8588/1759/files/afman_23_110.pdf
    • https://cdn.shopify.com/s/files/1/0436/1617/4243/files/8631401619.pdf
    • https://cdn.shopify.com/s/files/1/0432/5802/0004/files/chemistry_questions_and_answers_for_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/lexepuxegawapuwetanileti.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/96649061840.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/logical_and_analytical_reasoning_questions_for_class_8.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/lectionary_umc_2020.pdf
    • https://cdn.shopify.com/s/files/1/0439/2887/9272/files/eichmann_en_jerusaln_libro.pdf
    • https://cdn.shopify.com/s/files/1/0434/6960/2981/files/age_of_war_unblocked_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/gewibusiwizalutedimojis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008cce.bin
0e8703ce93be160f32bd20497e84a6c0d8e2769fe288735123e0e55b6bbc56c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCE 5528 bytes
font_01_sfnt_off00009fa0.bin
369f0a8b261539cedc1416ecf39fe3274caddeb0140e224dc6cc87d18cce608e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FA0 10148 bytes
font_02_sfnt_off0000c26c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC26C 4324 bytes

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