Malicious PDF — malware analysis report

Static analysis result for SHA-256 426719ae83b1e2d1…

MALICIOUS

PDF

44.4 KB Created: 2020-09-04 01:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ae61708ba863f63e53ae35745a5fbf1 SHA-1: bb33581b8048724c8a2be081e19b918d18ff2598 SHA-256: 426719ae83b1e2d18431b532e1299db0feb9e4730f9f78509d9e96b5d2be26fd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=beyonce+dress+formation+video'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one to 'https://cdn.shopify.com/s/files/1/0457/8636/6118/files/cheeni_kum_hai_movie.pdf'. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links, suggesting a social engineering lure to drive traffic to malicious infrastructure.

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.me/wix?keyword=beyonce+dress+formation+video
    • https://cdn.shopify.com/s/files/1/0457/8636/6118/files/cheeni_kum_hai_movie.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/54338745979.pdf
    • https://cdn.shopify.com/s/files/1/0446/8460/7641/files/13853371356.pdf
    • https://cdn.shopify.com/s/files/1/0437/6346/6391/files/mudolevojivazegugevumugap.pdf
    • https://cdn.shopify.com/s/files/1/0438/9086/8379/files/61002633537.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4665/files/wokekiwafalumezolexaz.pdf
    • https://static.usrfiles.com/ugd/353d00_eaa4fa9e222e4270b0223c202d211a10.pdf
    • https://static.usrfiles.com/ugd/7baf93_e67b0123e0b04820b56e6f5039c373bd.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/43735978018.pdf
    • https://cdn.shopify.com/s/files/1/0448/1312/3744/files/symbol_latex.pdf
    • https://cdn.shopify.com/s/files/1/0436/0654/0445/files/junior_business_analyst_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/32527005362.pdf
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/weather_report_peshawar.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_off000061c6.bin
524eac8e72466ba28679c7f8b47ff86c9d2d08ed57a1f5d773445b061065c7b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x61C6 5132 bytes
font_01_sfnt_off0000732a.bin
59e140e8c3eb697e5cc6c0f2ee9e872b025d0e8f6610c257930445a3c8751487
pdf-font-stream PDF embedded font (sfnt) at offset 0x732A 10472 bytes
font_02_sfnt_off000096ee.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x96EE 4324 bytes