Malicious PDF — malware analysis report

Static analysis result for SHA-256 0299d8281336e2af…

MALICIOUS

PDF

116.9 KB Created: 2020-08-04 16:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18f7e4dd56add9b320e7039d91976581 SHA-1: 1d758642364b7786c6a498ca4dd242f33dbd1da0 SHA-256: 0299d8281336e2af45e1dbb7a94aa38c3c8bd327fac2405ee5d558369c31d6b2
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with one prominent link identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The document body, though heavily obfuscated, contains the target URL, indicating the primary intent is to redirect the user to malicious infrastructure.

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.com/pify?keyword=artificial+neural+network+architecture+pdf
    • http://files.tcjewelrydesigns.com/uploads/1/3/0/8/130813732/jagudisixusazenev.pdf
    • http://nisowa.rubyrosecowgirlclothes.com/uploads/1/3/1/6/131636655/nizibafolufokudefek.pdf
    • http://files.utahcleanwater.org/uploads/1/3/0/9/130969427/pagel.pdf
    • http://files.evil-dog.com/uploads/1/3/0/7/130775470/lotolamuzebiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/30408514713.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5207/files/sojukixafumanezototir.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/visesuxopusebobolexi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/kipimexedonuki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/wixafatejodixanisifavu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/d_d_5e_dominate_monster.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/83938061294.pdf
    • https://cdn.shopify.com/s/files/1/0429/9105/9097/files/labajimegazidinojudu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/sazubevodiwosu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7691/9200/files/applied_psychology_in_human_resource_management_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/lemisaduneg.pdf
    • https://cdn.shopify.com/s/files/1/0437/8899/2674/files/47175996389.pdf
    • https://cdn.shopify.com/s/files/1/0434/5646/3001/files/wario_land_shake_it_iso.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/zekuxajap.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/kuzoneku.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_off00018ece.bin
0ed7b372af6450cf3d7e31b9503db0e469e5a42d7ad7ca5f5828cf35111f7c63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18ECE 5212 bytes
font_01_sfnt_off0001a091.bin
0ae8b163826f4631053867c7171ea0db8066abb347c30536883ae7ff700c3e07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A091 10928 bytes

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