Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9f7dd23192f91fd…

MALICIOUS

PDF

39.4 KB Created: 2020-08-08 07:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7f95505f40cdd792ab1909355fcc9b3 SHA-1: c09cfe2653759921a7342ebdd206c0b55e20606e SHA-256: a9f7dd23192f91fd8ef416c3cfda42addc0cb0ef59f78ce9b4cb45b3537082b0
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm designed to manipulate search engine results. The primary malicious indicator is the link to 'ttraff.ru', a known malicious redirector. This suggests the document's purpose is to drive traffic to malicious infrastructure, potentially for further exploitation or phishing. 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.ru/pify?keyword=currency+risk+definition+pdf
    • http://files.yvckirksville.org/uploads/1/3/0/8/130874585/1418361.pdf
    • http://files.yourvividevent.com/uploads/1/3/1/3/131383586/sevixopaga.pdf
    • http://files.freightrainsandhorses.com/uploads/1/3/1/3/131379820/simex.pdf
    • http://files.randalldavidsonmusic.com/uploads/1/3/1/3/131381677/xidog.pdf
    • http://files.healthymindsinstitute.org/uploads/1/3/0/8/130814601/44190.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5903/files/madolarividurorifini.pdf
    • https://cdn.shopify.com/s/files/1/0440/4648/3606/files/97420776583.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/nba_youngboy_net_worth.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/nizawoninanux.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/kenshi_ditching_resources.pdf
    • https://cdn.shopify.com/s/files/1/0438/6072/1829/files/58851783831.pdf
    • https://cdn.shopify.com/s/files/1/0432/0913/0143/files/3ds_max_glass_material.pdf
    • https://cdn.shopify.com/s/files/1/0434/2857/7447/files/bhagavad_gita_chapter_17.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6397/files/gatufukakatomavamabe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/zafawulukivekuzesidas.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/xutupor.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9054/files/16010019156.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74731072541.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e3e.bin
c2470627093ffc3ec834daea15437a43105561a5b6e05358cb6c1a1184693d68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3E 4976 bytes
font_01_sfnt_off00006f4c.bin
78c21d311b27b4a0aa3c508de04e0baf2b72db3de18d1b1dd2a3dd2faffe74b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4C 9692 bytes

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