Malicious PDF — malware analysis report

Static analysis result for SHA-256 71783e2aeb59866b…

MALICIOUS

PDF

47.2 KB Created: 2020-08-18 20:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 831740b8427e7ce98491929c37699dc5 SHA-1: d35431e8c0cb9820c8683f1ce98fcc7596f79040 SHA-256: 71783e2aeb59866bdaaeeb185173d498d9a6e94303b7f3388a9cb36217958a3b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text referencing 'Camera guard pro blocker apk' and the malicious URL, suggesting a phishing or scam lure. The presence of many external links, including benign ones, indicates a link farm strategy, likely to obscure the malicious destination.

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=camera+guard+pro+blocker+apk
    • http://files.toplinepriority.com/uploads/1/3/1/4/131407179/pojiletasudajoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5598/6326/files/shipping_up_to_boston_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/21097973426.pdf
    • https://cdn.shopify.com/s/files/1/0438/4233/8981/files/34639470878.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5591/files/lolonorinoduvozopogolarel.pdf
    • https://cdn.shopify.com/s/files/1/0440/0329/5382/files/fenezidakakamesiseda.pdf
    • https://cdn.shopify.com/s/files/1/0444/0725/9302/files/accountability_definition_in_management.pdf
    • https://cdn.shopify.com/s/files/1/0430/4653/5322/files/annona_reticulata.pdf
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/92572064063.pdf
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/64014689865.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/zoganitemat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12091312038.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8807/files/curriculum_vitae_format_for_freshers.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063a5.bin
3eb8a669dca17fc3fdfe685fcb5ef7308d7594c1403cd8b1fe921b0303de95f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A5 5324 bytes
font_01_sfnt_off000075a2.bin
8f1267c2fe7d643909b4087cfa8d2ab2f7556862b28ff811156e2132c0b60e9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A2 10524 bytes
font_02_sfnt_off000099d0.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99D0 16092 bytes

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