Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3eb3058925557c7…

MALICIOUS

PDF

38.5 KB Created: 2020-09-10 03:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2857fbbae53d374250d73cff1c3ab52b SHA-1: dfcce9e139780de6fbdb0e0e79090a18ceb4ffc8 SHA-256: f3eb3058925557c73ebe289e1dd1f548c38b47f26ea077781faeffce5e041fc1
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body contains a URL that appears to be part of the lure, suggesting a phishing or scam attempt. The presence of numerous external links, including those pointing to potentially malicious domains, indicates an attempt to direct users to harmful 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.link/pify?keyword=marriage+certificate+online+form+nepal
    • http://files.runnroll5k.com/uploads/1/3/1/3/131383837/wuvulemijuvored.pdf
    • http://files.bayanhajj.com/uploads/1/3/1/4/131407704/tojezewenudexil.pdf
    • https://static.usrfiles.com/ugd/a91264_3d92c669f53d44e4af4e55f9d4d3303e.pdf
    • https://static.usrfiles.com/ugd/0dd040_c864c8bd08e54caeabce63339f813ae6.pdf
    • https://static.usrfiles.com/ugd/05301a_4af04217aa8c44b786925dd074eee355.pdf
    • https://static.usrfiles.com/ugd/b4f0c6_0963558ab5524e45858dfee4c437ef7d.pdf
    • https://static.usrfiles.com/ugd/269bb8_65a929662339473391c8a2a99223d3ef.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_5add591ff0344a069d2a5ec79b18ca30.pdf
    • https://static.usrfiles.com/ugd/15d534_1a786e8ea2944f1a8bf027247a80938f.pdf
    • https://cdn.shopify.com/s/files/1/0438/2903/5158/files/snake_python_3._7.pdf
    • https://cdn.shopify.com/s/files/1/0433/4495/3509/files/walking_on_the_chinese_wall_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/golizikedakumeru.pdf
    • https://cdn.shopify.com/s/files/1/0460/6119/1323/files/jackie_chan_adventures_1_sezon_trke_dublaj.pdf
    • https://cdn.shopify.com/s/files/1/0457/9042/9340/files/igcse_economics_worksheets.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_off00004c29.bin
0300a5f70db72c5d97626ed87b8a638146d08bf6188bd2eb37c407496b9e16c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C29 5164 bytes
font_01_sfnt_off00005db7.bin
8d247020a56d54eb1571c1fe8425dcca01712c4fa562caa9461594c77f971dff
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB7 10188 bytes
font_02_sfnt_off000080d7.bin
31e1d71ae2ea24b1c84185afc84b9845658d6931307e2c7157ce986b77db8e3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x80D7 2560 bytes