Malicious PDF — malware analysis report

Static analysis result for SHA-256 0052f9746dc256b2…

MALICIOUS

PDF

51.9 KB Created: 2020-08-09 10:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 223bdb460f91580330d43e8d3b65f8b8 SHA-1: eaea6b79bb591b512bf6728dcef9764b9379d7c5 SHA-256: 0052f9746dc256b2107439c1c3955a822f60370830564eef66d2c73d9a106bb6
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This URL is presented as a download for a Java guide, but analysis indicates it leads to malicious infrastructure. The document also contains a large number of external PDF links, many of which are hosted on Shopify, suggesting a link farm or SEO poisoning tactic to distribute the malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=java+a+beginner+s+guide+pdf+download
    • http://files.parentsforcare.org/uploads/1/3/1/4/131437312/bf8c4093d5f79.pdf
    • http://files.santiagocimadevilla.com/uploads/1/3/1/3/131383649/8897f5f4e5ee00.pdf
    • http://files.marzipan-media.com/uploads/1/3/1/8/131856184/7584706.pdf
    • http://files.sustainableseacoast.org/uploads/1/3/0/7/130776344/3487008.pdf
    • http://files.glassplaqueawards.com/uploads/1/3/2/6/132683334/zudirulidaxoroxotex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/17147253322.pdf
    • https://cdn.shopify.com/s/files/1/0437/3987/3429/files/wow_arcane_mage_artifact.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/primary_health_care_definition_according_to_who.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/67387944474.pdf
    • https://cdn.shopify.com/s/files/1/0430/9552/3485/files/86497108075.pdf
    • https://cdn.shopify.com/s/files/1/0435/6207/4261/files/wezurawitenidunexoderefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3822/0181/files/tizafezivora.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30812088679.pdf
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/jurnal_bronkitis_akut_pada_anak.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/11042341987.pdf
    • https://cdn.shopify.com/s/files/1/0435/1678/8890/files/fezebulefege.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0964/files/cataract_grading_scale.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/24154921570.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/nuludawido.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_off00008bd5.bin
d75adbf2e4bc9da59c7c861671f351ffaf19a7ff90445087a1f41ce6866aa57b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD5 5488 bytes
font_01_sfnt_off00009ea2.bin
8214169f27674045482ca53fce7eabb2bfa1d42d496d2a39d698e2e3aded4bab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA2 10444 bytes

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