Malicious PDF — malware analysis report

Static analysis result for SHA-256 182bd134f7e22df2…

MALICIOUS

PDF

38.5 KB Created: 2020-08-23 05:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcf4c7ab6f299e6ac8eeab243bd1f183 SHA-1: 10b5c05b6cfdc2a41977e923cc63dad5aaa5792d SHA-256: 182bd134f7e22df2e086eff5258aebe6e8aa6adfceb31dd1a8df987c29ff6f6a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link disguised as a SQL query formatter, which leads to a link farm of 18 other PDFs. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL confirms a malicious intent to lead users to potentially harmful content. No scripts were extracted, but the PDF structure itself is used to host and distribute links.

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/pify?keyword=best+sql+query+formatter+online
    • http://tikigozuv.kidhelper.net/uploads/1/3/2/6/132681824/4475278.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3658/0759/files/ghantasala_bhagavad_gita_song.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9557/files/ahmad_shah_abdali_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/83753273106.pdf
    • https://cdn.shopify.com/s/files/1/0464/7446/1352/files/boishakhi_song_2018.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4590/files/37969146718.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/nixasapawalu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4646/8769/files/ccie_security_v5_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/kuwavesowufefefokupo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005019.bin
0e1e5d81a6eab7a8806f4ba166e2c59a37cc4baab44aae21e2ca6ed3e62cc09f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5019 5192 bytes
font_01_sfnt_off000061ac.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x61AC 1800 bytes
font_02_sfnt_off00006a3a.bin
2089d8d987e21428b406f7a59b4168482c478186c62fc8d908b04b42f02b2054
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3A 10312 bytes