Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f44a32e52895ef…

MALICIOUS

PDF

45.7 KB Created: 2020-10-16 15:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d94b5193c359617ef085c1ddd2266ebb SHA-1: 37c197b303ed90c45292b8547e51e1a64730af62 SHA-256: b4f44a32e52895ef471ff7403eb8fbce099f7f46b904fb7e59e28c0c89f60a54
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search results, leading to a malicious redirector at https://ttraff.club/123?keyword=maya+angelou+book+pdf. This indicates a phishing or scam attempt to direct users to malicious content. The ML classifier strongly supports the malicious verdict.

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.club/123?keyword=maya+angelou+book+pdf
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/1286989.pdf
    • https://zekuwatifakaxi.weebly.com/uploads/1/3/2/8/132815855/2679260.pdf
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/rasavef.pdf
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/f7f429ddf6.pdf
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/jogowezokuvaxu.pdf
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f873aa2cc611.pdf
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f88f2d17f295.pdf
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f88104079694.pdf
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5f8918d97a551.pdf
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f8785c5f1f3e.pdf
    • https://cdn.shopify.com/s/files/1/0483/3669/9555/files/south_lomei_labyrinth_guide.pdf
    • https://uploads.strikinglycdn.com/files/c30c1186-ac14-44a4-b369-844ee9d1c7c9/91591239049.pdf
    • https://uploads.strikinglycdn.com/files/45428c13-6607-4dea-949f-bc8d1b1f5728/39136427477.pdf
    • https://uploads.strikinglycdn.com/files/bb0143fd-2892-45d7-b34a-ba801f87ad6a/sipavobatux.pdf
    • https://cdn.shopify.com/s/files/1/0439/9782/3134/files/persona_3_tartarus_block_2.pdf
    • https://cdn.shopify.com/s/files/1/0496/5213/8148/files/vukezalavepagerozex.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_off00006742.bin
7a812d03ec0c5177441e68b5335a8a3787c12e6f02dc44ad2d3a3c5c78d753e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6742 5000 bytes
font_01_sfnt_off0000785e.bin
0969d5764dc4743bb63986776f91e539108f8ae8806fd6e5da6a9a40da6d9946
pdf-font-stream PDF embedded font (sfnt) at offset 0x785E 10496 bytes
font_02_sfnt_off00009c2c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C2C 4324 bytes