Malicious PDF — malware analysis report

Static analysis result for SHA-256 6309300320cb351d…

MALICIOUS

PDF

50.1 KB Created: 2020-08-07 13:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 519a1893053d8675e8999bce733b0497 SHA-1: 1ec61b301ca8be5c708362c735c188271a6c484a SHA-256: 6309300320cb351d14620672f422f882d3966d435c7d80b91337ed25c5a10dac
154 Risk Score

Malware Insights

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

The PDF contains embedded links designed to redirect users to a malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to academic papers and a URL that appears to be part of a link farm, suggesting a phishing or content-scraping lure. The ML classifier strongly indicates maliciousness.

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=makalah+aspek+keperilakuan+pada+etika+akuntan+pdf
    • http://files.colorsofthewindhorsefarm.com/uploads/1/3/0/7/130775228/dimitiloti.pdf
    • http://files.lakeeriefiberarts.org/uploads/1/3/2/6/132696210/3198562.pdf
    • http://files.valeriesaltacupuncture.co.uk/uploads/1/3/1/0/131070535/1455029.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3101/0199/files/96276708737.pdf
    • https://cdn.shopify.com/s/files/1/0435/8730/5629/files/84240919555.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4121/files/tisudubetepewifelikimame.pdf
    • https://cdn.shopify.com/s/files/1/0440/8950/7990/files/anatomia_de_nervio_facial.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/72194007470.pdf
    • https://cdn.shopify.com/s/files/1/0431/0768/0405/files/janoxiguriximoxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/97872698297.pdf
    • https://cdn.shopify.com/s/files/1/0432/1050/6404/files/37821827588.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/34970609941.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/puxusataxaloxegoban.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9834/files/65519642744.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/61661745019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ed4.bin
b3d4c5a6a445c18e5376ddaa372d6b7df3d6f012ab84ec921437f59f55ef7411		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED4 5196 bytes
font_01_sfnt_off00009081.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9081 1800 bytes
font_02_sfnt_off0000990e.bin
e6515bc18878326967bf81ca9322d2d308bd48a88bfc8267cf910d1a64bb4747		 pdf-font-stream PDF embedded font (sfnt) at offset 0x990E 9772 bytes

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