Malicious PDF — malware analysis report

Static analysis result for SHA-256 ace650b416e6472b…

MALICIOUS

PDF

43.2 KB Created: 2020-08-01 15:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc6b89a6830ccd01182549f07b16dbf8 SHA-1: b847b83e6e2b509a5212494fcaf4d9b1dab49795 SHA-256: ace650b416e6472bac59da17e10006f20b5b819ae4c5a9743ebf7f31dfbe6256
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of numerous external links, including one to `ttraff.com`, suggests a link farm or redirection attack designed to lead users to malicious sites.

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=guiding+bolt+dnd
    • http://files.freelandyouthwrestling.com/uploads/1/3/1/3/131380495/jopifazuf-porevet-fivafagefej-joranulizid.pdf
    • http://files.cedarbluffhoa.com/uploads/1/3/1/1/131163705/4785699.pdf
    • http://files.intermountainregionpc.org/uploads/1/3/2/3/132303310/ludepu_rokevipipidaja_nejufagiva_funuwizapanat.pdf
    • http://files.mastropiece.com/uploads/1/3/0/7/130739369/f2bc868ba43f1.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/15184086702.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92904811518.pdf
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/44330824197.pdf
    • https://cdn.shopify.com/s/files/1/0432/0293/6992/files/rulozi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/25944847129.pdf
    • https://cdn.shopify.com/s/files/1/0434/7002/8966/files/shane_bieber_fangraphs.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/22078130032.pdf
    • https://cdn.shopify.com/s/files/1/0440/6129/4757/files/nevujabo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0120/7193/files/76383743224.pdf
    • https://cdn.shopify.com/s/files/1/0432/2911/8627/files/wutuvu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/wosimejamo.pdf
    • https://cdn.shopify.com/s/files/1/0439/0020/7272/files/58908181812.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_off00006014.bin
80f50f154094fa6b70a4f193fc703da28fc5d25b568cf9d45af02cce66e55abf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6014 4444 bytes
font_01_sfnt_off00006f33.bin
ef1a34e8458876e5cce6c7a39776f10c11d6cf620d61fa704b88d05a77bffe7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F33 10184 bytes
font_02_sfnt_off00009210.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9210 4324 bytes

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