Malicious PDF — malware analysis report

Static analysis result for SHA-256 2287126aae547007…

MALICIOUS

PDF

33.6 KB Created: 2020-08-07 16:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a870efe9c779ba577e0d3c644b0c075b SHA-1: 3010a8b335aafc9e4f2acc735b74817770eb40fd SHA-256: 2287126aae54700717021f4e6cbdb82ce9cb8e72388b4bef5a35d52e1c2f78f5
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=calculus+by+howard+anton+11th+edition+pdf'. Another critical heuristic identified a PDF link farm, suggesting a tactic to distribute malicious content or engage in SEO abuse. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the redirection to malicious URLs embedded within the document.

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.com/pify?keyword=calculus+by+howard+anton+11th+edition+pdf
    • http://files.styleincluded.com/uploads/1/3/2/3/132303270/096ef9.pdf
    • http://files.fineartbyrachel.com/uploads/1/3/0/7/130775959/vumadolapabi.pdf
    • http://files.parktutoring.net/uploads/1/3/1/0/131070307/b90d1b1b91.pdf
    • http://files.cvubaseball.com/uploads/1/3/1/3/131380687/3508699.pdf
    • http://files.cyclonecanvas.com/uploads/1/3/1/4/131453969/321ac3abf19.pdf
    • https://cdn.shopify.com/s/files/1/0437/5373/4298/files/madulimuvakasanik.pdf
    • https://cdn.shopify.com/s/files/1/0435/1374/1471/files/debikixelapojunan.pdf
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/tufogutasilorisi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3466/4347/files/zufitejajetara.pdf
    • https://cdn.shopify.com/s/files/1/0432/5454/6590/files/43050382494.pdf
    • https://cdn.shopify.com/s/files/1/0439/2573/3531/files/sql_server_2020_new_features_for_dba.pdf
    • https://cdn.shopify.com/s/files/1/0441/0654/7352/files/xepoduje.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/48042212670.pdf
    • https://cdn.shopify.com/s/files/1/0431/5932/2773/files/98616448391.pdf
    • https://cdn.shopify.com/s/files/1/0429/1146/5638/files/medicine_ball_workout.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/3355043265.pdf
    • https://cdn.shopify.com/s/files/1/0432/5376/0162/files/wakarijukuvozip.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004664.bin
6cbe17849bfe9cf1df36f4d60be7eabefbae81ef83ae5b1b35dfffaf69f3e715
pdf-font-stream PDF embedded font (sfnt) at offset 0x4664 5536 bytes
font_01_sfnt_off00005941.bin
2f3025b60d96fe954555f74f5db2b4a1bddb3a10170f47fbb4f632b2e4e5bb02
pdf-font-stream PDF embedded font (sfnt) at offset 0x5941 9384 bytes