Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b3514b10b016f5…

MALICIOUS

PDF

55.6 KB Created: 2020-08-19 03:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1cc22226933e5ccacb591ae2fccb7c9 SHA-1: 407cc7cfb514b5f61c878cf10b1dee00332c0bc3 SHA-256: 17b3514b10b016f5eff4871381b2976f85983cce5aea73f7070ef2e12b50a15f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to a known malicious redirector, specifically `https://ttraff.com/pify?keyword=wordpress+themes+free+premium`. This suggests the document is designed to trick users into visiting malicious websites under the guise of providing free WordPress themes. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=wordpress+themes+free+premium
    • http://files.spectrabuildingdesigners.com/uploads/1/3/1/4/131453111/f1c59375df7b8.pdf
    • http://files.aboutta2s.com/uploads/1/3/0/7/130738696/lejasa-gurizelo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/8724/0093/files/28719395043.pdf
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/62114540930.pdf
    • https://cdn.shopify.com/s/files/1/0435/1721/4874/files/all_new_odia_movie_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0430/1098/2041/files/27124657495.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/74030461425.pdf
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/16655040684.pdf
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/66441834812.pdf
    • https://cdn.shopify.com/s/files/1/0431/9179/5873/files/chemical_equilibrium_physical_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/49709182682.pdf
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/synaptic_transmission.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_off000090a5.bin
9e03670c7b99aec62f9d3d01617a1464e906b9b2880e1f0d0464b2d3bffc7b4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x90A5 4828 bytes
font_01_sfnt_off0000a124.bin
2b762272d5185474f909762278a932fcb45fc582f1c0004f7521e05eb954f83e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA124 9952 bytes
font_02_sfnt_off0000c33b.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC33B 4324 bytes