Malicious PDF — malware analysis report

Static analysis result for SHA-256 980a59e36f3dc718…

MALICIOUS

PDF

48.9 KB Created: 2020-08-29 21:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0bb257a4113826eb31b3c6a885084ec SHA-1: adf6ab531013620832323ff763bba840134ff8d4 SHA-256: 980a59e36f3dc71863c5008fd4ca45be74c40534a076df0c7c02157ced3738a8
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=download+shadowrun+pc', is designed to redirect users to potentially malicious content. The PDF also exhibits characteristics of a link farm, with numerous external links, suggesting a broader campaign to distribute malicious files. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=download+shadowrun+pc
    • https://static.usrfiles.com/ugd/b8c837_515eaca7ad8d4dcc94d13af5426e78b9.pdf
    • https://static.usrfiles.com/ugd/856cea_ed6e4ba17c4a40bdb87ac0d66f7fae59.pdf
    • https://static.usrfiles.com/ugd/277b62_57594098bf4040c0848906bad092a6e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_fba881b756674e429f852991f1cceaf2.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/kurevulepuvitesoxugabivon.pdf
    • https://cdn.shopify.com/s/files/1/0435/3415/5928/files/botawanagijizu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/pukatam.pdf
    • https://static.usrfiles.com/ugd/b8c837_f76e49bd4db54925b40a48ba9ca7779d.pdf
    • https://static.usrfiles.com/ugd/b8c837_3818fe0eb3334579ad71dfd449b18d41.pdf
    • https://static.usrfiles.com/ugd/b8c837_66510327cdb34ea39dd840bf1933f4ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_48d56d99f5db44099dd19650b14b9f03.pdf
    • https://static.usrfiles.com/ugd/b8c837_25da434c14cf4d2d94f57eb5210c90f3.pdf
    • https://static.usrfiles.com/ugd/cec570_42c8ad5017ed4249bf38b058748f5ede.pdf
    • https://static.usrfiles.com/ugd/b8c837_e60a3f6fed6a4e6895ae32bda2748de4.pdf
    • https://static.usrfiles.com/ugd/c3548c_0d217400a70448688dbc501970f11356.pdf
    • https://static.usrfiles.com/ugd/921909_cfbb9daa49d643aa957d2cdadf73b955.pdf
    • https://static.usrfiles.com/ugd/2274a7_bc91b7e088124d63ac488e72fe69a7aa.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_off00006675.bin
c6cd4c86204660c6508ce86f9fe6795fa793c5ec9eff191958ccbbbda3c8e4ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6675 5252 bytes
font_01_sfnt_off0000785b.bin
71102c76fc80bbed22b8d3f43b6726bb5b1b899e22bdebf1574457581060bce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x785B 10748 bytes
font_02_sfnt_off00009d27.bin
12c8803c81b0bd465a25bbdd11d297878886904b129eb6b54b7d4af5344daf90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D27 17616 bytes

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