Malicious PDF — malware analysis report

Static analysis result for SHA-256 b49c7e00b8929944…

MALICIOUS

PDF

43.7 KB Created: 2020-08-02 08:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7e75b46b07ba9913c2a7851c07ae414 SHA-1: 28353d9d0a1cbd7b24d9f0000002c80474fcb97c SHA-256: b49c7e00b8929944b1c34db563a65e46e9a3a54089f0bed0dafd6b83c030a097
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=watch+sausage+party+online+for+free', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and a large number of other PDF links hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=watch+sausage+party+online+for+free
    • http://files.alexseyreyes.com/uploads/1/3/2/3/132302855/9796772.pdf
    • http://files.koinoniaatclarion.com/uploads/1/3/1/4/131453870/92333.pdf
    • http://files.infinitydesignjewelry.com/uploads/1/3/2/6/132682802/6a1dfe.pdf
    • http://files.5wishesgeelong.com/uploads/1/3/1/4/131438195/gesexa.pdf
    • http://files.jessicainnes.co.uk/uploads/1/3/1/1/131163723/firago-xudubajiwari.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/bar_plot_pandas.pdf
    • https://cdn.shopify.com/s/files/1/0431/6577/8080/files/duzinoguvokafunaves.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48880371243.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/85380391292.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/fuxoxelavopabujalesow.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/32038991329.pdf
    • https://cdn.shopify.com/s/files/1/0428/0752/5542/files/gafugorigu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5196/5855/files/zezavugefalibisox.pdf
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/50680930805.pdf
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/bidodekonevapujanarenidum.pdf
    • https://cdn.shopify.com/s/files/1/0440/6706/1910/files/daisy_powerline_880_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/62101961569.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/64283348272.pdf
    • https://cdn.shopify.com/s/files/1/0432/8207/1716/files/95375207586.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_off00006b10.bin
e2921cd6bf61468d6e36e19383e62a724865a81455f4a3d8b33572c0255272df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B10 5392 bytes
font_01_sfnt_off00007d77.bin
102c086157b91c1a79f2f9c880aeb3c1d4578b538e48cabf28cae5d5fbc12aea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D77 10648 bytes

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