Malicious PDF — malware analysis report

Static analysis result for SHA-256 059d2d2053996e4c…

MALICIOUS

PDF

40.7 KB Created: 2020-08-19 06:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53e8c1e78b322a0bf3b7e1582820319c SHA-1: e2eca33b5ab4b8ba9ad6bcc03c5d74e776913540 SHA-256: 059d2d2053996e4c437fde51d65169741882c618bbb9dbc9c47f428232f48360
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a malicious redirector URL, disguised as a download for Minecraft mods. The ML classifier strongly indicated maliciousness. The embedded links likely serve to distribute malware or lead to phishing sites, aligning with spearphishing attachment tactics.

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=lucky+block+mod+for+minecraft+pe+android
    • http://files.artitudemarty.com/uploads/1/3/2/6/132681954/munezede_jixogavonajidu_xebivigub_waremedidujifiw.pdf
    • http://files.writethegoodfuture.org/uploads/1/3/1/8/131872015/sokoneb.pdf
    • http://files.fuertefitness.com/uploads/1/3/0/7/130775834/zasunem.pdf
    • http://nojezuxa.thecrossingchurch.net/uploads/1/3/1/3/131379246/4482381.pdf
    • http://gunik.ericaalmquistphotography.com/uploads/1/3/2/6/132695375/3f052eae32903.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9659/5861/files/python_interview_questions_and_answers_for_experienced_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4199/files/barthel_index_score.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/que_es_un_agente_patogeno.pdf
    • https://cdn.shopify.com/s/files/1/0429/2388/4711/files/338825409.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/bending_moment_formula.pdf
    • https://cdn.shopify.com/s/files/1/0434/5679/0695/files/disawiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5025/files/atkins_fisico_quimica_6_edio.pdf
    • https://cdn.shopify.com/s/files/1/0434/6334/4280/files/dujasevupinasovojejusa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4671/5040/files/4656201013.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81256704061.pdf
    • https://cdn.shopify.com/s/files/1/0436/9462/0837/files/goripefabipajafix.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_off00006165.bin
8fd1c773b3472b6b9611a529841ea1196c185692242a2f3f9c9e1e41a6555795
pdf-font-stream PDF embedded font (sfnt) at offset 0x6165 5368 bytes
font_01_sfnt_off00007398.bin
8e7eeb4562c5930f274ef131773b1e00d45ab54de6323b4ab496f4f7e34dc5bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7398 10296 bytes