Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff52e96711d0145d…

MALICIOUS

PDF

48.5 KB Created: 2020-08-20 03:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 356d05f3b0b97a6acdf9002818ee2285 SHA-1: 1b635a2e79f9fe072c74311dc3d05a542b2c3092 SHA-256: ff52e96711d0145d39e859816181333324245713c80ee0cdb1f0c9111034e87b
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, constituting a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves as the initial stage for delivering further malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

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.cc/pify?keyword=hell+let+loose+guide
    • http://files.hairandmakeupbyalicia.com/uploads/1/3/1/4/131483632/zatarike.pdf
    • http://files.kocanada-usa.com/uploads/1/3/1/4/131437538/zorodoke.pdf
    • http://files.jovaunholmes.com/uploads/1/3/0/8/130873973/818c81.pdf
    • http://polebidaw.mahasiddhasandmonks.com/uploads/1/3/1/8/131855981/fc3836a8e44.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/3259868017.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8168/files/the_5th_wave_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0946/files/15666725014.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gamefidijuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8922/2037/files/muligujiganugujeto.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2441/files/marathon_electric_motors_manual.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/sagagokadevet.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/principales_monosacaridos.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/meniwekaxogop.pdf
    • https://cdn.shopify.com/s/files/1/0434/0210/0899/files/63047381734.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/setal.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0154/files/78023129195.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6333/files/autodesk_autocad_2012.pdf
    • https://cdn.shopify.com/s/files/1/0433/8571/6886/files/business_studies_grade_11_essays.pdf
    • https://cdn.shopify.com/s/files/1/0429/6661/4175/files/69836314746.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075a0.bin
7b63a8fff90e9053b4ada4fdc01ea3743c607ac971363cc61235da014b536c92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A0 4424 bytes
font_01_sfnt_off000084b9.bin
396b6d2f5a91e13c7c9b55f01ee7995554a03e8fe0813e739082556827e97de5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84B9 10008 bytes
font_02_sfnt_off0000a6fa.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6FA 4324 bytes

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