Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18343ed880d89f3…

MALICIOUS

PDF

48.5 KB Created: 2020-08-16 19:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6f5f1beb3a7d1d65acb3794f1a8987b SHA-1: 3d67a92e2fbd1e352454ef453bb1b36529443a09 SHA-256: f18343ed880d89f32cdad65d7610564a7b019090806c23586d01f2eced6fb0af
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large farm of external PDF links. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.ru/pify?keyword=kingsoft+spreadsheet+software, which likely serves as a redirector to further malicious content. The document body contains garbled text and embedded URLs, reinforcing the link-based attack pattern.

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.ru/pify?keyword=kingsoft+spreadsheet+software
    • http://nezope.takeyourchancetravel.com/uploads/1/3/1/6/131637240/889859.pdf
    • http://files.nycjazzworkshop.com/uploads/1/3/0/7/130739069/1860158.pdf
    • http://zifefobew.louisianagrainhistory.com/uploads/1/3/0/8/130873822/rubufiwoja_femeg.pdf
    • http://files.fwrna.org/uploads/1/3/1/4/131407067/2914307.pdf
    • http://jezexikag.springvalleygirlssoccer.com/uploads/1/3/1/3/131383483/13dff.pdf
    • https://cdn.shopify.com/s/files/1/0438/8562/5499/files/technical_analyst_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9203/4211/files/74983012591.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6250/files/algebra_and_trigonometry_ron_larson_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.pdf
    • https://cdn.shopify.com/s/files/1/0435/1570/7551/files/definition_of_cardiotonic.pdf
    • https://cdn.shopify.com/s/files/1/0433/4980/3162/files/zaxizipuzinopolazilezom.pdf
    • https://cdn.shopify.com/s/files/1/0431/5722/5638/files/wild_n_out_season_8_episode_10.pdf
    • https://cdn.shopify.com/s/files/1/0430/1930/5113/files/sezimitigigazonidul.pdf
    • https://cdn.shopify.com/s/files/1/0430/8602/0761/files/sutosuvelimutugire.pdf
    • https://cdn.shopify.com/s/files/1/0428/3554/2182/files/guzuwemoxejozin.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8242/files/youtube-_dl_reddit.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_off00006c27.bin
19ea13ee887fc09c242d3345c3f7e378af35af99577a6ef891e1bb916f8de4c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C27 5196 bytes
font_01_sfnt_off00007e3e.bin
1e3de281ae16b9251d9f248057d214cafd1e05ea643701556da17e2069a8393f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3E 5332 bytes
font_02_sfnt_off00009070.bin
04d18f8507d76e6b8f508234bb30cee7fb52e0625eb9f33d241e1259e06fc913
pdf-font-stream PDF embedded font (sfnt) at offset 0x9070 10520 bytes