Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b270a9907454804…

MALICIOUS

PDF

43.1 KB Created: 2020-08-31 22:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb3f1b192eb3a0b3208fb33289cb4efd SHA-1: 41f4e2d0005087225465de2a7d2c4208d92cd9ed SHA-256: 6b270a99074548044090870f0cca59dc6e0136050cb68bc4b6a540e8a01e17f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.cc, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF files, suggesting a link farm designed to direct users to malicious content. No scripts were extracted, but the presence of numerous links to potentially malicious infrastructure is a strong indicator of a phishing or redirection attack.

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=send+bundle+intent+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/735189_35b7e2b4278b41bdbc12eebe2accd8c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_42c352870c6d464aa2ba5c4fa26692ff.pdf
    • https://static.usrfiles.com/ugd/8b4172_83ff3f31cca441ea876ca574403e6748.pdf
    • https://static.usrfiles.com/ugd/b8c837_58492f66ab424fb8bc72b81a71a7c012.pdf
    • https://static.usrfiles.com/ugd/43d598_a17b91699f044f409931ccebe234b3ed.pdf
    • https://static.usrfiles.com/ugd/f967ac_a513851151dd4569ac04c34155bb1b54.pdf
    • https://static.usrfiles.com/ugd/b0b521_a70d4009684a4ca08c93678322b49ea1.pdf
    • https://static.usrfiles.com/ugd/7f16bd_593f41bebdd24b6f8553a845a773e1d5.pdf
    • https://static.usrfiles.com/ugd/b77b08_3af588110aab4c2aa3f737f7c80e7c6b.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/20645287706.pdf
    • https://cdn.shopify.com/s/files/1/0427/9386/1279/files/velizuwisovibufigof.pdf
    • https://cdn.shopify.com/s/files/1/0438/5705/1808/files/pathfinder_beyond_the_veiled_past_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0744/2072/files/biochemistry_practical_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9544/files/adafruit_gfx._h_arduino.pdf
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/classical_conversations_challenge_1.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_off000069fc.bin
73803329f0aeb580e49cd993e5fad7115815d4bd86519873b64552f5dc5ad429		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FC 4884 bytes
font_01_sfnt_off00007a9e.bin
31b8adfd1b47c8f1af25d33cbf5aa8ec1e610c06102fe7f0a3cb7e0509294230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9E 10756 bytes

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