Malicious PDF — malware analysis report

Static analysis result for SHA-256 181e9079a96e4a2b…

MALICIOUS

PDF

43.0 KB Created: 2020-08-09 05:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9153ba53cdff84727b29c1ccd078fff SHA-1: 20164616a96b200b699fb2d9d85ce9cdea197c12 SHA-256: 181e9079a96e4a2b28f5540ba448d5c13e4e4e2a9d126ebe361d3594d3916d2a
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at ttraff.com. The document body, though obfuscated, contains text related to a 'riyadh cable medium voltage catalogue pdf' and the malicious URL, suggesting a lure to download a malicious file. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=riyadh+cable+medium+voltage+catalogue+pdf
    • http://files.leaannlewis.net/uploads/1/3/0/7/130775362/7185956.pdf
    • http://gurowi.modafabrictreasure.co.uk/uploads/1/3/0/8/130874284/nefaga.pdf
    • http://files.kmmcfarland.com/uploads/1/3/0/7/130739719/kezubededadefuwid.pdf
    • http://files.jmbmoldings.com/uploads/1/3/2/3/132303082/kimojot_vozifof_runazagezezoda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5630/7107/files/80820314548.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/67368294385.pdf
    • https://cdn.shopify.com/s/files/1/0438/2133/4688/files/ralubixejekibabizanof.pdf
    • https://cdn.shopify.com/s/files/1/0435/1275/8426/files/redumibifojuvabofipu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8276/0870/files/analogue_and_digital_signals.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/36556514949.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12091312038.pdf
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/bodezavosimebevarukibef.pdf
    • https://cdn.shopify.com/s/files/1/0434/0629/5201/files/wozuzupikirawimi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9195/1769/files/dixigewemub.pdf
    • https://cdn.shopify.com/s/files/1/0430/6698/2561/files/45327500818.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9605/files/38745627690.pdf
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/kiboripemipibozuzoluda.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_off00006a46.bin
296e56dc8fe9e411dbe99872168c25c25da228caa9cbb62ca7f0c53d000e3b41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A46 5604 bytes
font_01_sfnt_off00007d4d.bin
bc7856bbb71dde3a5561a7d7848dd25661cc1b138f2c395f2ad19f325eaa3e98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4D 9776 bytes

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