Malicious PDF — malware analysis report

Static analysis result for SHA-256 3edf9d37f47ebdf3…

MALICIOUS

PDF

62.0 KB Created: 2020-08-06 20:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 100acb18bd50918c46a68a1d84b59aef SHA-1: f05592433407046121ce3d334666ab3e39e994b9 SHA-256: 3edf9d37f47ebdf355791026c3aa1eff1fb9e0f8e5c75b2d47f26c89bf3ac346
152 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=bericht+schreiben+muster+pdf'. This indicates a likely phishing or malware distribution attempt, leveraging a lure related to report writing. The ML classifier strongly supported the malicious verdict. No scripts were extracted, limiting the analysis of specific execution behaviors.

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.cc/pify?keyword=bericht+schreiben+muster+pdf
    • http://lokagew.cccommunityscholarships.org/uploads/1/3/1/4/131454549/janulam.pdf
    • http://files.mindfulmedical.vip/uploads/1/3/1/4/131407042/maxefu-lowex.pdf
    • http://fomagolu.yogatheartofwellbeing.com/uploads/1/3/0/7/130776326/91ddbd0cac72.pdf
    • http://files.gracehousebrunswick.org/uploads/1/3/1/4/131453555/3527725.pdf
    • http://files.rivalme.org/uploads/1/3/1/4/131408913/7178274.pdf
    • https://cdn.shopify.com/s/files/1/0440/9750/3384/files/24694125398.pdf
    • https://cdn.shopify.com/s/files/1/0431/2835/7020/files/mac_address_prefixes.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6285/files/ruwunojuxeralub.pdf
    • https://cdn.shopify.com/s/files/1/0432/8574/1726/files/bose_wave_radio_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9658/files/kukune.pdf
    • https://cdn.shopify.com/s/files/1/0434/3971/8562/files/apc_back-_ups_es_750_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/71263843783.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/pufomizudirin.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6833/files/todiviziripugi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4640/2213/files/nisageke.pdf
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/nujuxu.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_off00009e00.bin
d902ec693bb6cefb3345af8b7e4cd881efc7d4aa81553e12280258b1ccc0e589		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E00 5340 bytes
font_01_sfnt_off0000afff.bin
4377c68f95cdeb5d089d4c3114248ca0bd80c879f3683efda68f7409255f47c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFF 11560 bytes
font_02_sfnt_off0000d602.bin
018fe7ab8f823a3cb090921c1c485b4b19f8bb00c3f2c8bff27a3b653d2cb391		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD602 16084 bytes

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