Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe86c8dc3c23d6e0…

MALICIOUS

PDF

51.2 KB Created: 2020-08-30 08:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12a98d97a6cad33b6be8f3c571be92d1 SHA-1: a83fad1355c8b55ca87892f51f04e40f179d02dc SHA-256: fe86c8dc3c23d6e002f3a8ecec3d9170efb313a4bf42e371d80fb7cd111cf48c
152 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the presence of the URL https://ttraff.cc/wix?keyword=liquid+metal+fast+breeder+reactor+pdf strongly indicate a phishing or redirection attempt. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The ML classifier also flagged this PDF with high confidence.

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=liquid+metal+fast+breeder+reactor+pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/71007858658.pdf
    • https://cdn.shopify.com/s/files/1/0431/0486/2375/files/boxewuwizug.pdf
    • https://cdn.shopify.com/s/files/1/0431/3831/8487/files/xudaxewexogulino.pdf
    • https://static.usrfiles.com/ugd/b8c837_3413ef6c17534686b8aa834b96393b91.pdf
    • https://static.usrfiles.com/ugd/b8c837_b10f1ca66d2d46b0a9a5e89f3e9c9169.pdf
    • https://static.usrfiles.com/ugd/b8c837_768799232fe64d4eb1ea42bf39b28721.pdf
    • https://static.usrfiles.com/ugd/b8c837_498797f69b75420b9030a21ffcf375ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_0509c4930e4f42fbb07dcd56a78f5ac6.pdf
    • https://static.usrfiles.com/ugd/b8c837_11e0f9032a244d7096a530e51bef1904.pdf
    • https://static.usrfiles.com/ugd/cc089a_8def09b1cf60420ab5e339bd179fff13.pdf
    • https://static.usrfiles.com/ugd/de02f3_4542aadcb8b5478d80383718fd7ebb4c.pdf
    • https://static.usrfiles.com/ugd/8cbfce_ee05fc7993f6481cbd5d382a8c4ad6a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e034a549c214af7834858400ab585ea.pdf
    • https://static.usrfiles.com/ugd/87a178_ffd13bbec7274e0782ff11c8f6d41546.pdf
    • https://static.usrfiles.com/ugd/0c41e7_4f7edc137ee949fb8875d6742a19aa19.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067fd.bin
c578319575dc736608d70a185f35d6c9094fc956aec28d9dbee39025cbf101f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67FD 6060 bytes
font_01_sfnt_off00007cdf.bin
8a27c8f72aeb8d59f76ba73b17cf564ec8d46455649415c79cde47a4a3c229a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDF 5284 bytes
font_02_sfnt_off00008ec5.bin
f5d59a6a896204f325af06d69e849d8204065830a325b9640d58b5d49f5fc580		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC5 10140 bytes
font_03_sfnt_off0000b165.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB165 4324 bytes

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