Malicious PDF — malware analysis report

Static analysis result for SHA-256 131e46dffe32cb81…

MALICIOUS

PDF

40.2 KB Created: 2020-08-28 16:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad4553e9e550b46cb0c177cb53d8c0de SHA-1: fd839bbf0d5119f76964fd0698f0cff1d14f25f1 SHA-256: 131e46dffe32cb819081dac929aed966eb8630313653232ba92aff1b067a5418
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for 'predicate nominatives worksheets'. The presence of a link farm and a critical heuristic firing for malicious redirector links strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and embedded links are indicative of a malicious intent to redirect users to harmful content.

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=predicate+nominatives+worksheets
    • http://files.baileyjackartstudio.com/uploads/1/3/1/3/131398143/genuzedogiz.pdf
    • http://bowuxo.fcsautomation.org/uploads/1/3/2/6/132680835/5a6870c8c014.pdf
    • http://files.quitthecravings.com/uploads/1/3/1/8/131857115/nizadatiwurisizaju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5730/8063/files/ninoxal.pdf
    • https://cdn.shopify.com/s/files/1/0440/4881/0149/files/71185365321.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2384/files/8947771006.pdf
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/xujakobemorufu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8221/0725/files/fevimelezejozaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/9058/2435/files/kadezedobakefa.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/rs_aggarwal_reasoning.pdf
    • https://cdn.shopify.com/s/files/1/0436/3006/7865/files/zuzukoboganawijovavonu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7762/files/ketewivifuziwipafi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3259/files/adding_double_numbers_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0569/7438/files/93094870888.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/dawaziniletu.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_off00005fd6.bin
8c547844a9fe55938f7e67773cef20b365356cbe710e43fe140ff45e29ef0652		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD6 5364 bytes
font_01_sfnt_off000071f0.bin
7b3c0416b809bdc37a2e2c1709e5e410800dd040ea2ad7351a13363f0c2b3339		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F0 10024 bytes

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