Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bb380b94dba893…

MALICIOUS

PDF

47.6 KB Created: 2020-08-15 03:37:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6af6648f0971cea6453adca3ef7f7839 SHA-1: 565021639ed41d4473eb755b970a7145472459dd SHA-256: 72bb380b94dba893ebfcd3fc909ae89432b8393c464e3204f2d370aa797313c9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link to a known malicious redirector infrastructure, disguised with keywords related to 'Pathfinder druid wild shape spreadsheet'. This heuristic, combined with the ML classifier flagging the PDF as malicious, strongly suggests an attempt to lead the user to harmful content. The document also hosts a large number of external PDF links, many pointing to Shopify, which is characteristic of SEO link farm abuse.

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.com/pify?keyword=pathfinder+druid+wild+shape+spreadsheet
    • http://tonepa.manilaaudioclub.com/uploads/1/3/1/4/131438539/dedotegivix-raluk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/44145185415.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/rivumibufigirorisixe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9815/2866/files/acculturation_and_enculturation.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8913/files/febrile_neutropenia_in_pediatrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/6246/7489/files/integration_by_substitution_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/5164/6119/files/pathfinder_path_of_war_expanded.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/get_happy_the_life_of_judy_garland.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/joxevaripuxekavive.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_off00007f00.bin
0dcb88f3d73cc02b9cd1aa08310e4d5c0d2d4ff9d5c1dcf4f59410cf41df39c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F00 5220 bytes
font_01_sfnt_off000090c8.bin
10a4c846275fc38894e5758e19ce3d380145cda83d9e9e5543765237cf9a6752
pdf-font-stream PDF embedded font (sfnt) at offset 0x90C8 9780 bytes