Malicious PDF — malware analysis report

Static analysis result for SHA-256 33f29ca0189d5daa…

MALICIOUS

PDF

44.6 KB Created: 2020-08-04 11:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13c1c4e632a19498ab7dc5961809c37f SHA-1: ce3741346bd54f4187d70d75e25879f469e35cb4 SHA-256: 33f29ca0189d5daa92cad4327cb7fd27d67a68be7a4c9626ab78ffb6b22fbe08
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a cooking PDF. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous links, many pointing to benign Shopify URLs but also including malicious redirectors, suggests a link farm or SEO poisoning tactic to distribute malicious content.

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=basics+of+cooking+pdf
    • http://files.aphroditesclosetalameda.com/uploads/1/3/1/4/131453151/fovezove.pdf
    • http://xibuk.merseysidearchsoc.com/uploads/1/3/1/0/131070872/durolis.pdf
    • http://wivekeret.unclerhetts.com/uploads/1/3/1/4/131408056/65cc1.pdf
    • http://files.mkeddleman.com/uploads/1/3/1/4/131409309/lopolawatirun.pdf
    • http://files.madisimmons.com/uploads/1/3/0/7/130738875/bac7f5ea49e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9617/8845/files/rule_34_star_trek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44329390643.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0661/files/minecraft_prison_servers.pdf
    • https://cdn.shopify.com/s/files/1/0434/6200/0806/files/nusodilokinikizexagugale.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/43550326424.pdf
    • https://cdn.shopify.com/s/files/1/0428/6706/4998/files/33854502985.pdf
    • https://cdn.shopify.com/s/files/1/0434/7972/8281/files/darapaseti.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9275/files/ketot.pdf
    • https://cdn.shopify.com/s/files/1/0432/3989/9304/files/12021410737.pdf
    • https://cdn.shopify.com/s/files/1/0438/6727/5424/files/rikugabufa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3593/4370/files/kirupadanaxegelovopoju.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/gifulolonoramibasenixuw.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_off000071c4.bin
b028f179bf1ea80a10ea9964eae8f523a23b6189e7ac6d61773782971afe14d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C4 5308 bytes
font_01_sfnt_off000083f2.bin
3e459d9ecccfa2ff713eedfd802dad74335cae5c9278fbc30d9dbe815c9be1fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83F2 9808 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.