Malicious PDF — malware analysis report

Static analysis result for SHA-256 afab97302a3d2066…

MALICIOUS

PDF

44.4 KB Created: 2020-08-27 19:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d251e9373b08bf69408ac5b77a4366d SHA-1: 2a6fc56dbf0e5a0c130bbefac5dd53db07db7ccf SHA-256: afab97302a3d20664f7892381ed14151a148ecd6e27656639a9282c65655b17c
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves leveraging these links to lure users to potentially harmful sites. No scripts were extracted, limiting the analysis of direct payload execution.

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.ru/pify?keyword=vlc+green+screen
    • http://files.magia-metachemica.net/uploads/1/3/2/6/132695582/xazifadikos-mitako.pdf
    • http://files.ribbonsbyfir.com/uploads/1/3/1/8/131857734/fepefepibosunerodu.pdf
    • http://vovegotib.2325maurystreet.com/uploads/1/3/0/7/130775997/depug.pdf
    • https://cdn.shopify.com/s/files/1/0430/3542/6970/files/jesiguvakuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/4164/4963/files/xobevurabi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/bawotab.pdf
    • https://cdn.shopify.com/s/files/1/0462/3889/2192/files/tixenava.pdf
    • https://cdn.shopify.com/s/files/1/0431/6545/0389/files/zadedejudo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/8657214398.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/jatimebozudaboxew.pdf
    • https://cdn.shopify.com/s/files/1/0460/1656/1319/files/tipinofirefev.pdf
    • https://cdn.shopify.com/s/files/1/0450/2549/3150/files/caries_dental_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/74982848329.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/vejimusuba.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_off00007122.bin
abf15bfd9b795f678cfa143ffe0261df8dfbfacaa76b8b9273cb5540e191109c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7122 4720 bytes
font_01_sfnt_off0000814a.bin
901dd133b2b80825fc459ec970f36e05b863474bd04da457475ac073b25bede4
pdf-font-stream PDF embedded font (sfnt) at offset 0x814A 10656 bytes