Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a02b3e34e7dbe1…

MALICIOUS

PDF

41.0 KB Created: 2020-08-23 17:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7aaa7c7dbcc2ed0eadac10dc7385b8eb SHA-1: 68d6c8f992504a8302974105f18744ae35d415bc SHA-256: 06a02b3e34e7dbe146ad17508a41033ff5f6fc116839b9394213e154966f5cc3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=view+background+color+android+xml`. It also exhibits characteristics of a PDF link farm, with numerous external links, including one to `https://cdn.shopify.com/s/files/1/0434/8903/4402/files/convert_file_into_word_document_online_free.pdf`. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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=view+background+color+android+xml
    • http://files.aelc.org/uploads/1/3/0/7/130775672/lagujumejunesof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/convert_file_into_word_document_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0451/9398/6199/files/jamabidame.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/jafulerira.pdf
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/parts_of_a_dictionary_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/duguduzufubodesukidibupo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/315_pares_biomagneticos.pdf
    • https://cdn.shopify.com/s/files/1/0453/3213/6091/files/biology_notes_for_neet_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/kitobizifedaselixexoj.pdf
    • https://cdn.shopify.com/s/files/1/0440/4445/2005/files/23694681111.pdf
    • https://cdn.shopify.com/s/files/1/0430/8258/0130/files/68034066310.pdf
    • https://cdn.shopify.com/s/files/1/0438/5089/1424/files/kabawimukem.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000612d.bin
0f93f19e9729a865954162482313d0490c1416f5e8eda1e57c964fcad42ea268
pdf-font-stream PDF embedded font (sfnt) at offset 0x612D 5408 bytes
font_01_sfnt_off00007393.bin
d335174e9c1374b7ab2ba24c05cf99e4247684a8a64862b19b2d442da1877c4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7393 10516 bytes