Malicious PDF — malware analysis report

Static analysis result for SHA-256 949ce6623ea081cb…

MALICIOUS

PDF

74.5 KB Created: 2020-08-11 20:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef8619e0b1c19644a666e20336de04e0 SHA-1: 13fbae581ce046b1ab6903ca2476773a824e4ca2 SHA-256: 949ce6623ea081cbb0d5105dd935345e608cbbe2b6431e789f8218103925f3f4
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure (https://ttraff.com/pify?keyword=bioluminescent+bacteria+pdf). Another critical heuristic indicates a PDF link farm, with many links pointing to shopify.com domains, suggesting an attempt to manipulate search engine results or distribute content broadly. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of malicious redirector links and the link farm structure strongly suggest a phishing or malware distribution attempt.

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=bioluminescent+bacteria+pdf
    • http://sovalibum.bluecactustriathlonclub.com/uploads/1/3/0/8/130814297/7893785.pdf
    • http://files.crippled.ca/uploads/1/3/0/8/130814118/kopitoduzilusafena.pdf
    • http://files.refacemasters.com/uploads/1/3/1/6/131606011/64998287.pdf
    • http://files.southernperfection.com/uploads/1/3/1/4/131438293/9578725.pdf
    • http://files.lightenupwithliz.com/uploads/1/3/2/7/132740494/xawij.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/70851846884.pdf
    • https://cdn.shopify.com/s/files/1/0434/4738/6262/files/essentials_of_investments.pdf
    • https://cdn.shopify.com/s/files/1/0434/3028/1381/files/riesgo_cardiovascular_aha.pdf
    • https://cdn.shopify.com/s/files/1/0436/8728/0790/files/gazetajidomabanogujet.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/juditomuxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/kosodeguxilabibowor.pdf
    • https://cdn.shopify.com/s/files/1/0434/7517/3528/files/descriptive_research_design_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/avalon_hill_midway_rules.pdf
    • https://cdn.shopify.com/s/files/1/0450/4292/5726/files/introduction_to_logical_thinking.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/biology_class_10th.pdf
    • https://cdn.shopify.com/s/files/1/0431/2878/3002/files/89155202623.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/gimejilirogikilavakesaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/36502585986.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/47173054453.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_off0000e66b.bin
3b0cbe030728b996e5d6d46a556f5921b48b3e945e42915a3a52fa51445c74b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE66B 5492 bytes
font_01_sfnt_off0000f8ee.bin
8c57fb8881cea8d35501dd6c16ba718e2456cd603436aa379e998cf3914595cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EE 10468 bytes

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