Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe1c2aabf621db2…

MALICIOUS

PDF

46.9 KB Created: 2020-09-02 02:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02069339f59c52c4387e2726ed3998c7 SHA-1: 751053b2c95c5f9e03a8ad064096ca619a70bae3 SHA-256: 0fe1c2aabf621db257a384281b632bb555a5a60d9ef7e210dd00f6245f4403aa
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a search result, which redirects to a malicious URL. This is further supported by heuristics indicating the PDF hosts a link farm and is flagged by a machine learning classifier as malicious. The embedded URLs suggest an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

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=christina+aguilera+halloween+costume+missguided
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/565485_bb7e3e82e9e04bd0be266f401a82bbf2.pdf
    • https://static.usrfiles.com/ugd/3e9e83_ad0e7e0bee0d4223b84c95db449b553f.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_85e2aa3cac5b4bc28e0e4d9b2d6532ca.pdf
    • https://static.usrfiles.com/ugd/9b5f63_6d360a23ce4c48c287f8a4ad90b469b5.pdf
    • https://static.usrfiles.com/ugd/33ab24_38957d41508342e1a356dd10be6b9b85.pdf
    • https://cdn.shopify.com/s/files/1/0443/4948/9308/files/bit_by_bit_book.pdf
    • https://cdn.shopify.com/s/files/1/0439/3231/9912/files/82813604899.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4487/files/metallica_one_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0440/6290/0374/files/41797576709.pdf
    • https://cdn.shopify.com/s/files/1/0432/4445/4051/files/sad_song_video_hd_mp4.pdf
    • https://static.usrfiles.com/ugd/808d8c_9767431425f9418d8546dcdec3792d96.pdf
    • https://static.usrfiles.com/ugd/575363_420d13fb07a84fd2a9dce7b851387395.pdf
    • https://static.usrfiles.com/ugd/8d0191_6bce710556f44f11ae225ec55adb3d50.pdf
    • https://static.usrfiles.com/ugd/faa7ef_012311ca39524d5683162d9ad0eeb6a2.pdf
    • https://static.usrfiles.com/ugd/97634b_802c6dd2f5e84a0ab9db10b7f2636c8d.pdf
    • https://static.usrfiles.com/ugd/3de8a6_f598ff20cd9f4ae49b71cd7d6ea4e0ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_b81ac38642b74f08bdbb3dde42b2d1c8.pdf
    • https://static.usrfiles.com/ugd/d2b720_9b95a19ce3de4975b091ce96c0cdaa22.pdf
    • https://static.usrfiles.com/ugd/10b11f_8daf2e12e28e45f08d2151db5685dac5.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075fa.bin
e2993851f260261a1503c9d4c723a12cfd52fd2070b6f8cde30ce3f72741a952		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75FA 5348 bytes
font_01_sfnt_off00008807.bin
5b7f7079f1e77cbf60c8236b2653935095e03329c98b1f4a39da4c19890b46b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8807 11080 bytes

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