Malicious PDF — malware analysis report

Static analysis result for SHA-256 e171d1e12d894000…

MALICIOUS

PDF

37.7 KB Created: 2020-08-05 08:37:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38ddd26af05352081fe3b7dd138b8ec1 SHA-1: adddb2fb08967d56424f59687ca6e3003e6a6914 SHA-256: e171d1e12d894000fad63148297a0db18d56ecd7523670be2b1f14293f91dcfc
152 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=captivated+by+you+sylvia+day+pdf+download', indicating a potential phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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=captivated+by+you+sylvia+day+pdf+download
    • http://files.mercymedicalarts.com/uploads/1/3/0/8/130814003/f94645f87ceb46.pdf
    • http://files.bagnallproperties.com/uploads/1/3/0/7/130740571/9c7ec8a.pdf
    • http://files.crazyabtcupcakessd.com/uploads/1/3/1/3/131379724/beleduwezezib-lomusikexoke.pdf
    • http://migeju.annotalegal.com/uploads/1/3/2/3/132302780/wakenadijedo.pdf
    • http://files.nivafoundation.com/uploads/1/3/0/8/130814225/fexotijabuwep-gulabup-gejesip-komos.pdf
    • https://cdn.shopify.com/s/files/1/0437/5304/6165/files/autonomy_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54101174921.pdf
    • https://cdn.shopify.com/s/files/1/0430/7052/1495/files/95758930823.pdf
    • https://cdn.shopify.com/s/files/1/0429/0543/6326/files/72219700684.pdf
    • https://cdn.shopify.com/s/files/1/0432/7414/1864/files/7296440250.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/gabigoxomipesamu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/96909113968.pdf
    • https://cdn.shopify.com/s/files/1/0431/3936/7061/files/9716628240.pdf
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/49841298859.pdf
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/juvavasuxixosep.pdf
    • https://cdn.shopify.com/s/files/1/0439/1917/9931/files/87244950329.pdf
    • https://cdn.shopify.com/s/files/1/0440/9327/6312/files/33256109346.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_off000054a0.bin
8b638a2cae052cc0e4d0c739ba876695eb3ca1a342257b2afd75dba5fcdc2b3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54A0 5236 bytes
font_01_sfnt_off0000669a.bin
d72f4dff7f279e879a483efac863c2fd1b71b7ca4c52e22b809ba5209fd38f04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669A 10348 bytes

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