Malicious PDF — malware analysis report

Static analysis result for SHA-256 1abc410e14abc8c6…

MALICIOUS

PDF

35.4 KB Created: 2020-08-13 19:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e5fefc47a27e8d336bd76e43fcff856 SHA-1: 45e8792af60d39f387ca518cf1725f3ab30e0f13 SHA-256: 1abc410e14abc8c6233e01601c09a8ec1083b27f924f724a9a2542e00c4c6b03
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to potentially malicious redirectors or link farms. The primary malicious URL identified is ttraff.ru, which is associated with a redirector. The document body, though partially corrupted, contains text suggesting a 'joining report' lure, which is likely intended to trick the user into clicking the embedded links. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=joining%20report%20for%20gazetted%20teacher%20pdf
    • http://files.powerofbankinginyourhands.com/uploads/1/3/2/6/132682919/3411665.pdf
    • http://files.pinemountainlakelodge.com/uploads/1/3/0/7/130739616/7d50ba082854.pdf
    • http://files.myeagerlaw.com/uploads/1/3/2/6/132696060/7559619.pdf
    • http://lojegef.katiegage.com/uploads/1/3/0/9/130969204/4167348.pdf
    • http://files.hollandsshelter.com/uploads/1/3/0/8/130813400/juwadijulibete.pdf
    • https://cdn.shopify.com/s/files/1/0428/2790/7239/files/ano_ang_teorya_ng_wika.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/66182557468.pdf
    • https://cdn.shopify.com/s/files/1/0435/7046/2883/files/pinilujej.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/bubuvoralubevepiladu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3212/files/zozewupamito.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1415/files/32544661436.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/puvuzepimimupovilij.pdf
    • https://cdn.shopify.com/s/files/1/0430/9381/9541/files/oxford_picture_dictionary_bilingual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/23423095181.pdf
    • https://cdn.shopify.com/s/files/1/0430/3283/8298/files/91097471955.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_off00004115.bin
2dc53ebcec04d390626a3d2c14ce57b8537bd2b28b248b990934134ab1708d88
pdf-font-stream PDF embedded font (sfnt) at offset 0x4115 5032 bytes
font_01_sfnt_off00005228.bin
86a026b9d36e0792fafe30b953bec3405ab2b2e52405a2d5e186ce5793b219e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5228 9440 bytes
font_02_sfnt_off00007293.bin
8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7293 4324 bytes