Malicious PDF — malware analysis report

Static analysis result for SHA-256 77bedd8ebd40a1e1…

MALICIOUS

PDF

40.1 KB Created: 2020-08-21 17:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a353c03e43285e245c304c901c0ae882 SHA-1: 4f25c40741f8294a7bbe980ae6e5a2cb5e0dbab9 SHA-256: 77bedd8ebd40a1e1b755ac6361b12d55fcb7241f01cf64978e8166c75cff6486
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains a URL that is likely intended to trick the user into clicking it. The presence of numerous external links, many pointing to Shopify, indicates a link farm designed to improve search engine ranking for malicious content.

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=nesterj+nes+emulator+psp
    • http://ropim.trippz.ca/uploads/1/3/0/7/130776855/mulinibiritebuk.pdf
    • http://puwodovo.ops-copiers.com/uploads/1/3/2/8/132814742/tolofoki_nediwapi_sasuxagu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/1660735192.pdf
    • https://cdn.shopify.com/s/files/1/0440/2397/2005/files/gastroenteritis_viral_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/18494485593.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/p4merge_git_windows.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/agricultural_economics_research.pdf
    • https://cdn.shopify.com/s/files/1/0433/5747/0870/files/teamviewer_8_old_version.pdf
    • https://cdn.shopify.com/s/files/1/0429/3538/6275/files/pobaxuwixewexajazemoru.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/55804427607.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1716/files/af_931.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/chilli_rice_crackers_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/gatiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/45597041531.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3965/files/article_defini_ou_indefini_exercices.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055c1.bin
0d84a70885c67deecc3499bf2dd6efdf5561dbe8f4a94d4c4a9fb5f96947bcca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55C1 5008 bytes
font_01_sfnt_off000066ad.bin
6a77f955d39b9d81e75477a2b3a68a06f90d7b352a411c8fd057aba46c531b2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AD 2236 bytes
font_02_sfnt_off000070c4.bin
0c091a9cdc157f01d7e3a7172621befada8216414515c206edd67c2c3b202670		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C4 10032 bytes

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