Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e03146e4ab49d0…

MALICIOUS

PDF

79.6 KB Created: 2020-08-04 15:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f40021a2193ccc2ebcd363c65249bfe SHA-1: 3aed1b3797a05143c0b00b830bd95f16823ecd56 SHA-256: 67e03146e4ab49d06c60651d2cb2840cd01e7a2f23f8c046e1a80670d9a85d05
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with a critical heuristic identifying a malicious redirector URL (ttraff.cc). The document body, though heavily obfuscated, contains the same malicious URL. The ML classifier strongly indicates maliciousness, and the presence of many external links suggests an attempt to distribute further malicious content or phish users.

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=rudram+chamakam+english+pdf
    • http://files.emsworthstandrews.com/uploads/1/3/1/8/131871535/bce32ab9d.pdf
    • http://files.12monthbeauty.com/uploads/1/3/0/8/130874128/6301925.pdf
    • http://jamulaket.kootenayratraid.com/uploads/1/3/1/3/131383664/loxige_mixabowovu_namipodebepereg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/1683790979.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20807514836.pdf
    • https://cdn.shopify.com/s/files/1/0440/3593/2310/files/git_config_ssh_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/8649/6415/files/pioneer_avh_280bt_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4583/files/20438391144.pdf
    • https://cdn.shopify.com/s/files/1/0434/9935/6324/files/73342883053.pdf
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/53413024668.pdf
    • https://cdn.shopify.com/s/files/1/0431/0954/8188/files/79772584930.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70745323757.pdf
    • https://cdn.shopify.com/s/files/1/0434/9234/3970/files/dogitimotapananafoximiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/2315/5878/files/38883982382.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e479.bin
07e143a2e6ffe4f967664a2b812e7e4acbc37ccb47775fc73131ad7bb8f9c5c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE479 5332 bytes
font_01_sfnt_off0000f66a.bin
875fa73c17ff49d172f48e416a9b93fcae0c78a17b4a4a24610c526224c84895		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF66A 14500 bytes
font_02_sfnt_off00012322.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12322 4324 bytes

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