Malicious PDF — malware analysis report

Static analysis result for SHA-256 59afd9b6f6450b54…

MALICIOUS

PDF

49.3 KB Created: 2020-08-08 16:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8e73f7337ceb1fc3677c74fd27c70e9 SHA-1: 105b97046ea31db63e11619ba188cfc60b176b2d SHA-256: 59afd9b6f6450b5412b1fa7c27ba2f42c91a8fd0ae08e554d2b86b9f143104dc
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically the URL https://ttraff.ru/pify. This suggests a phishing or redirection attack aimed at delivering further malicious content. The document body, though heavily obfuscated, contains the same redirect URL and a reference to 'polymer characterization techniques pdf', indicating a lure to entice users to click the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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=polymer+characterization+techniques+pdf
    • http://files.sweetpotatopiedesigns.com/uploads/1/3/1/3/131380870/7882968.pdf
    • http://pulebovib.prohibition-spirits.com/uploads/1/3/1/4/131438079/2593911.pdf
    • http://files.simplydivinesuds.com/uploads/1/3/1/4/131407812/23f3d849.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1734/files/wefazoxorag.pdf
    • https://cdn.shopify.com/s/files/1/0437/7677/0205/files/pabexififomu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/void_ore_miner_setup.pdf
    • https://cdn.shopify.com/s/files/1/0428/4029/3543/files/dukes_anesthesia_secrets.pdf
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/vukotixumu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/curso_de_ingles_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/8068/7524/files/kixeraxaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7798/3653/files/13705490845.pdf
    • https://cdn.shopify.com/s/files/1/0435/7783/5681/files/zavilojizadip.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/capacitation_of_sperm.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_off00006ca2.bin
6742ff50884873eb68d5521241c702aefad8ce8ee3d7a431f193abba891f50bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA2 5672 bytes
font_01_sfnt_off00007fd1.bin
e76dfa891b268051ffa96f848b3af912234901a365c4b1ab5ef25b60660aeaaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD1 10008 bytes
font_02_sfnt_off0000a258.bin
89e8aafbe8ee2c7f3266b17cd39cf05f10435523f88472c7e1a1d2e3feddee8f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA258 16192 bytes