Malicious PDF — malware analysis report

Static analysis result for SHA-256 0075b84f8126dade…

MALICIOUS

PDF

45.0 KB Created: 2020-08-06 22:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ccefe2c7539886bc84bc5cb5dc3d004 SHA-1: 380f0510def95c58ebd1e3fa1b685a9da008f8a1 SHA-256: 0075b84f8126dadeb20e82b5704e2e0cc680d968b5d4c7b72fd127c075d4f504
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems T1059 Command and Scripting Interpreter

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body itself contains obfuscated text and the URL 'https://ttraff.ru/pify?keyword=filetype+pdf+learn+python+3+the+hard+way' which is likely intended to lure users into clicking on the malicious links. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=filetype+pdf+learn+python+3+the+hard+way
    • http://suzowiwa.artventureoc.com/uploads/1/3/0/7/130776760/negatajijativivodak.pdf
    • http://files.fieldcrestfootball.com/uploads/1/3/0/7/130775634/b64fa0c8376e0.pdf
    • http://files.tierecords.com/uploads/1/3/1/8/131857383/votur.pdf
    • http://files.omahaseniorresourcegroup.com/uploads/1/3/1/6/131606727/nitirepipiwa_murefa_xigufazevoxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/fozadawupu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0843/files/geekvape_aegis_solo_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0108/5082/files/memenivo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66656561998.pdf
    • https://cdn.shopify.com/s/files/1/0445/5186/4484/files/how_to_open_steam_console.pdf
    • https://cdn.shopify.com/s/files/1/0437/0703/9895/files/18230753192.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2775/files/pdf_to_dwg_converter_2020_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0450/6117/7507/files/ipa_phonetic_chart.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/4610_ford_tractor.pdf
    • https://cdn.shopify.com/s/files/1/0427/5824/2470/files/31728449884.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_off00005c2b.bin
7c9d968ae84c23bb372d19696824325b0eee508c8c51760dad3252f11f6e6887		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2B 5052 bytes
font_01_sfnt_off00006d69.bin
bd5ed227e58b13c6457d5c89f9bf3ac292d09338d9b7079f4a0009d2a361b9f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D69 15144 bytes
font_02_sfnt_off0000974c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x974C 4324 bytes

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