Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2afc10ba7bff6c…

MALICIOUS

PDF

41.9 KB Created: 2020-08-30 00:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c705aed67b28b3a1019ab3c7a174d51 SHA-1: 31aa9dc3763bf913735605f5fab2d1ca566db8c6 SHA-256: ce2afc10ba7bff6ceae3192329920131d2d6dbeed3f68a0414abf2f80b27da72
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm. One of these links, 'https://ttraff.com/wix?keyword=basic+kanji+book+vol+1+answers', points to known malicious redirector infrastructure. The document body is heavily obfuscated and contains remnants of this URL, suggesting the primary purpose is to lure users into clicking malicious links. No scripts were extracted, and the family is unknown.

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/wix?keyword=basic+kanji+book+vol+1+answers
    • https://static.usrfiles.com/ugd/ae15ca_e01af665ecc9477d8ba762cf4d1dbdd5.pdf
    • https://static.usrfiles.com/ugd/74c34a_ef927d36cdf241758982948a581597cc.pdf
    • https://static.usrfiles.com/ugd/fe83c3_1b058df6c9304420bb9725e1cbc8d0b3.pdf
    • https://static.usrfiles.com/ugd/01e791_85c949a83fed472d8168f4d0a730017f.pdf
    • https://static.usrfiles.com/ugd/b8c837_db43475c013b4a038cbe994afa5ee37f.pdf
    • https://cdn.shopify.com/s/files/1/0432/0890/0772/files/bagozafitirikes.pdf
    • https://cdn.shopify.com/s/files/1/0433/8676/5475/files/alif_laila_story_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/71860861446.pdf
    • https://static.usrfiles.com/ugd/ca32a8_e70d6351e86346fab329a6eb84f0e5cc.pdf
    • https://static.usrfiles.com/ugd/09273f_6ca1dddffe9f426db3f041de59c9624d.pdf
    • https://static.usrfiles.com/ugd/01e791_a7cb430dc352486283e79193fd55fc08.pdf
    • https://static.usrfiles.com/ugd/07625c_b8f07b4c76654ea2a129ef3984ce898a.pdf
    • https://static.usrfiles.com/ugd/b8c837_0da6a0fe77cb4ab7b346f046acb513bc.pdf
    • https://static.usrfiles.com/ugd/79e0dc_ca8046dfecbf4550a6f08867ac720da2.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_057399472b5c46ccb127b4149d566e32.pdf
    • https://static.usrfiles.com/ugd/d162e3_b65bacc3d7a747c6a1e4c839d4ee2b0b.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_off00004ed4.bin
36adee19701c0517f917aa4735c994c1a342b3bd03bcc74280255053da4f0b45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED4 4404 bytes
font_01_sfnt_off00005e38.bin
6903be1f49211893d57e9c6775e53e565203e4e9cbd57a52e5d11636ed283c0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E38 5324 bytes
font_02_sfnt_off00007077.bin
5172312b0f11cb683b1c7ca75a12adb548e27d77fd0bb502a096ce610ba7ff08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7077 13192 bytes

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