Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9dd3a90022a166…

MALICIOUS

PDF

51.2 KB Created: 2020-08-04 05:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f903e12544585278037efebb45f5578c SHA-1: 1b201ba8ab5021350c516cfb7c48fec370eabdbe SHA-256: 6f9dd3a90022a16606221771bf262cec5056232be8200fbd8c281813fa477b46
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO manipulation or to host malicious content. One of the primary links directs to a known malicious redirector, indicating an intent to lead the user to harmful infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or redirection attempt, likely delivered as a spearphishing attachment.

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=copper+wire+ampacity+pdf
    • http://files.myssatraining.com/uploads/1/3/2/8/132815882/mifawanugugabob.pdf
    • http://files.seattlechronicseeds.com/uploads/1/3/0/7/130776089/9fd65eb8feb3a.pdf
    • http://files.taylortechnology13.com/uploads/1/3/1/6/131606186/9391928.pdf
    • http://files.cissnaparklibrary.com/uploads/1/3/1/6/131636941/5380443.pdf
    • http://files.torratymakeup.com/uploads/1/3/0/8/130874691/ruwimugetub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/warolonikipapiwopimaro.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7535/files/craftsman_dyt_4000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0446/6461/9171/files/overstreet_price_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/8786/9592/files/wimoverepadelej.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/9338982576.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/gojifonoxapoma.pdf
    • https://cdn.shopify.com/s/files/1/0437/9371/1265/files/64440060601.pdf
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/rikufuporujarifuwak.pdf
    • https://cdn.shopify.com/s/files/1/0435/2521/0263/files/cone_crusher_operating_principle.pdf
    • https://cdn.shopify.com/s/files/1/0438/1566/5824/files/24716195838.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3384/files/fupudafub.pdf
    • https://cdn.shopify.com/s/files/1/0434/7854/8630/files/pci_design_handbook_7th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5342/4540/files/95148943931.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_off00007c3a.bin
0c6b2a7dc136e6a6a096fe62b1285249d1afb76226452af01208f8835121eea1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3A 5192 bytes
font_01_sfnt_off00008de6.bin
5cc2ef4f9fc1f5680ecb2ac419f5070e83a7d9d7986b3412030632d6ec041b69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE6 15336 bytes

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