Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c5a4e4d6b8029b9…

MALICIOUS

PDF

43.9 KB Created: 2020-08-24 12:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09929bea9a199defe3bf7b99796e252d SHA-1: b8e915e43a91b859f5d98c20753d2cb381756cea SHA-256: 7c5a4e4d6b8029b9263d89b6ee3ef62b2c16a2e2c1ce33ccd28fecfd8a958715
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is used to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to 'Asus gl503ge drivers' and includes the malicious URL, suggesting a lure to download fake drivers. The ML classifier 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.cc/pify?keyword=asus+gl503ge+drivers
    • http://parisudop.securevisionmediasolutions.com/uploads/1/3/2/6/132680835/rufavanav.pdf
    • http://begalawu.wellsteadshrubs.com/uploads/1/3/1/4/131452883/5118982.pdf
    • http://zexapaj.gautengseniors.com/uploads/1/3/1/4/131453598/2609111.pdf
    • http://files.webproxyforfree.com/uploads/1/3/0/7/130740517/8195d378385.pdf
    • http://files.lionessprayer.com/uploads/1/3/2/3/132303270/wumugagiguvejo_lumibakoki_kopexumipipufa_xonuwugaka.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/35906896326.pdf
    • https://cdn.shopify.com/s/files/1/0430/4194/7801/files/potaniwabasafanilu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2434/3462/files/41341981165.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/wilomuxoxixidimozefala.pdf
    • https://cdn.shopify.com/s/files/1/0430/4093/1991/files/latest_movies_site_bollywood.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/37691789230.pdf
    • https://cdn.shopify.com/s/files/1/0437/4197/0583/files/boundary_layer_theory_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/muforamuna.pdf
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/ziwigonusokudurowes.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/zapobobiputexirodomifad.pdf
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/56752022629.pdf
    • https://cdn.shopify.com/s/files/1/0428/5428/5479/files/giromirepiwisosatodar.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/nejeda.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/93162202875.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_off00006346.bin
8d1ae1289348b0cfdb23b23ac6d1863a14bbe778705cb8f215e43b860c162f66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6346 5260 bytes
font_01_sfnt_off0000753f.bin
5a419103deecf0c8e6dc5f175a796c9329973219958c13b16499e96fa0b404f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x753F 14828 bytes

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