Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0323d1a4dfc1165…

MALICIOUS

PDF

45.9 KB Created: 2020-08-02 20:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8ba5c13ff56f51afbf2da460adb2b3e SHA-1: 7cb1dde305d2638fd17a87721c8de0e28a8e7eae SHA-256: b0323d1a4dfc116563da9bb5a3dc5be9b649199aa1e954b22b31f0421a73d2f1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains numerous embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure related to academic material, specifically 'Essential organic chemistry 3rd edition pdf'. The presence of a link farm and the ML classifier's high confidence score further support malicious intent. The primary attack vector appears to be social engineering via a deceptive link.

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=essential+organic+chemistry+3rd+edition+pdf
    • http://files.pranayogaandmeditation.com/uploads/1/3/1/0/131070398/samazitil-kebugoko-gemenisa-vakukajafalurox.pdf
    • http://files.cottesloeyear12020.com/uploads/1/3/0/7/130776275/7137873.pdf
    • http://files.plymouthkarate.org/uploads/1/3/1/4/131453499/4606674.pdf
    • https://cdn.shopify.com/s/files/1/0432/8292/3676/files/igo_primo_usa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2428/4824/files/rirezaparisifujaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/7476/5475/files/48492283167.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/97166709967.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5645/files/93235246607.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6967/files/jekalyn_carr_bigger_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/6599920486.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93016620893.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/20175986508.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2411/files/bugapas.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/kisilijomi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9776/6553/files/54617010247.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/16006621428.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_off00007404.bin
e6039ea4bbb05918efb73af8a090b468f6e88632bf45232b533024a294163b5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7404 5792 bytes
font_01_sfnt_off000087a2.bin
fba218c47560cf1d89d3a485c8af013a4f4391afe7cc36629d5aa34f7f675903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A2 10164 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.