Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e214896eee24b0c…

MALICIOUS

PDF

44.8 KB Created: 2020-08-30 23:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f98c1a5f5b0c006bfdfb4965bef542e5 SHA-1: 0194de2d59bd6c5896fb199f8cb385d5aeefe64e SHA-256: 1e214896eee24b0c82c27023b3375ec5b8ce2567da5b4d79ea7c0d4a1dfc46a3
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, pointing to 'https://ttraff.cc/wix?keyword=ffxiv+leveling+50-60'. This URL is likely used to lure users to a malicious website. The document also contains a large number of external PDF links, many hosted on 'static.usrfiles.com', suggesting a link farm or SEO poisoning tactic to distribute the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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=ffxiv+leveling+50-60
    • https://static.usrfiles.com/ugd/739437_cde20eaa444d48c5af75f3a60372a8a7.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_133660be6a924280bf882a07aea321de.pdf
    • https://static.usrfiles.com/ugd/b8c837_d68c0965a14c4a3083f3c9f0077d06fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_9409e76bcbbd491ca9a1a541b54bb787.pdf
    • https://static.usrfiles.com/ugd/07625c_2797c6c4e69244fca3eaed68271b85c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f5225e6451e4c2489c941d403514265.pdf
    • https://static.usrfiles.com/ugd/98857b_d210ef36ad194df3951b6305578a722d.pdf
    • https://static.usrfiles.com/ugd/accd1f_054fc8ef88bf4b36889b8c18481e7eeb.pdf
    • https://static.usrfiles.com/ugd/3aee12_10d05aa68b6344d7a9384365b2657a3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc93742ee76546159e689593b292a611.pdf
    • https://static.usrfiles.com/ugd/b8c837_704e379a2a26416eabe240f17ddfaf37.pdf
    • https://cdn.shopify.com/s/files/1/0436/0205/1229/files/42774752527.pdf
    • https://cdn.shopify.com/s/files/1/0461/4337/3480/files/liregaxuj.pdf
    • https://cdn.shopify.com/s/files/1/0436/1561/7182/files/rufus_bootable_usb_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0432/2616/9503/files/jukonaseguwesege.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000721a.bin
b51d5f260254506545eb2490f857affe3114d2b5841831cd8fdbc988c250a563
pdf-font-stream PDF embedded font (sfnt) at offset 0x721A 4984 bytes
font_01_sfnt_off00008349.bin
5205e65b706c652076696467399cb6d734387e5553b079ad937fdcc36c6f739f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8349 10544 bytes