Malicious PDF — malware analysis report

Static analysis result for SHA-256 53c29e67b89ddbbf…

MALICIOUS

PDF

45.5 KB Created: 2020-09-17 03:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a236f26d9a28b393a5f1ae0808822756 SHA-1: e834a3ea1cafdd6d4b290ab440f0b5b01d82ef5b SHA-256: 53c29e67b89ddbbfd11b32b43412cefdbdc139839fa7836dba3be1fdd0c1ade5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded URLs, with 30 pointing to external PDF files, characteristic of a link farm or SEO abuse. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.club/wix?keyword=micca+mb42x+bookshelf+speakers. The ML classifier also strongly indicated maliciousness. The document body contains garbled text and a URL that appears to be part of the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=micca+mb42x+bookshelf+speakers
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/mr.bean_animated_series_free_download_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0437/5111/2858/files/how_to_find_secret_rooms_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gejazopemovaro.pdf
    • https://cdn.shopify.com/s/files/1/0429/1844/5223/files/82947087587.pdf
    • https://cdn.shopify.com/s/files/1/0449/7191/7471/files/blessed_assurance_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0437/1768/9512/files/8505882612.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.pdf
    • https://cdn.shopify.com/s/files/1/0437/7093/7495/files/journal_of_environmental_psychology_april_2018.pdf
    • https://cdn.shopify.com/s/files/1/0438/8411/8171/files/ba_1st_year_economics_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/99937709070.pdf
    • https://cdn.shopify.com/s/files/1/0430/9303/3111/files/eastern_state_hospital_lexington_ky.pdf
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/bofugodawizexiwomevilu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6294/2101/files/nodogodarug.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/booklet_graphic_design.pdf
    • https://12d1de65-05d9-4ac9-aa41-0be65b02079b.filesusr.com/ugd/29c71c_cbda1a6eed5c4a10b971cae0b5b8b8de.pdf?index=true
    • https://c3920484-15a6-48b5-aaec-437e39056ed9.filesusr.com/ugd/9ff9b8_ae43a62200d74fa08e525911ada9b7c3.pdf?index=true
    • https://4eb57061-51c8-4c02-b430-d28b42ce252d.filesusr.com/ugd/ffe0d3_a0d086f5a78842a09d7fa25d1c23cbba.pdf?index=true
    • https://5f59a367-5ffd-4303-adf9-cb8fe901f318.filesusr.com/ugd/2eedf1_3e544f8a501e4642942168245804dd72.pdf?index=true
    • 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_off000071c6.bin
515dbb8fa1b18669e2235c402cba70aa2c3e0518a6782660426c901a2dc51961
pdf-font-stream PDF embedded font (sfnt) at offset 0x71C6 5752 bytes
font_01_sfnt_off00008547.bin
e80b1810d4174f80d3a9a74fe5625197c49a2264378049f0091a5d7c3eb48c4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8547 10332 bytes