Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e71350411da1e3…

MALICIOUS

PDF

45.3 KB Created: 2020-08-28 19:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6e3699376556d5b6f433f9056f9901f SHA-1: cdfaeaaa98c7793ced7d764ed994297bb5623a38 SHA-256: 96e71350411da1e3debcfbabac55b656d76ac75c49a7c95922d466f4b88b205f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems T1059.001 PowerShell

The PDF document contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains the primary malicious URL. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be a link farm designed to redirect users to malicious content.

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=jason+and+the+argonauts+film+questions+answers
    • https://static.usrfiles.com/ugd/b8c837_2b1bded44bc649df9930a58778dcf501.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2a30a9a72904156b09b47f6b151624a.pdf
    • https://static.usrfiles.com/ugd/b8c837_608f256606fc4cddb6c01466de91364c.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/kizefo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/acrylic_clear_sheet_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/geometric_shapes_and_names.pdf
    • https://cdn.shopify.com/s/files/1/0437/6618/6135/files/123_movie_hub.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0605/files/carbohydrate_metabolism_file.pdf
    • https://cdn.shopify.com/s/files/1/0429/1294/0188/files/boney_m_christmas_carol_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/0397/6614/files/99850410332.pdf
    • https://static.usrfiles.com/ugd/b8c837_20e37c5d833c42aeb7bbb095db66a8da.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e21ccbca95d4bb39aa29dc03c6e41eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_9606e8de32fc4678b6a6a434a3988853.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc22890e19354a8c95a814f9dc2f3ac0.pdf
    • https://static.usrfiles.com/ugd/b8c837_e00a3a6dbe5044e19e79717ded6e2396.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_off00007359.bin
8c15a743839cf7c186bc6d8764c6250ac858f9022186dc3f7562896e2268fa9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7359 5528 bytes
font_01_sfnt_off000085fa.bin
b26cabc04f3a8b8d37d7e3c93793365e9a73fb765c5329df774a95233f21b8a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x85FA 10008 bytes