Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe9d67c2847a25f6…

MALICIOUS

PDF

41.2 KB Created: 2020-08-21 21:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0ddd51c36387bdf7ed18aba077f4c25 SHA-1: 0fdf4ef86ec09ef2aabcc8789037659a37e8144c SHA-256: fe9d67c2847a25f6f5e033dcc99455fc2ba68cb33e6afded371a4c8dca5d0bd2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to malicious infrastructure, disguised as a resume template. The ML classifier strongly indicates maliciousness. The embedded URL points to a redirector, which is a common technique for delivering malware or phishing pages. The document body, though heavily obfuscated, contains the lure text and the malicious URL.

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=office+manager+resume+template+free
    • http://xifoka.crossroadsaiken.org/uploads/1/3/2/7/132740264/31cb3392ff3dc.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/58425995024.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9617/files/pensar_la_arquitectura_peter_zumthor_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/74462240974.pdf
    • https://cdn.shopify.com/s/files/1/0438/2470/9782/files/vagipusalewanijakikobowu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6452/3926/files/25560215865.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0810/files/53780423346.pdf
    • https://cdn.shopify.com/s/files/1/0431/6371/3695/files/be_like_bro_memes.pdf
    • https://cdn.shopify.com/s/files/1/0432/8659/3694/files/garorozewegox.pdf
    • https://cdn.shopify.com/s/files/1/0431/4130/0380/files/mebabilarikoluxosesukixot.pdf
    • https://cdn.shopify.com/s/files/1/0438/0124/7906/files/civil_engineering_books_format.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_off000063ee.bin
255bca5325e90d3a349555b280cb81473133f64d275e860d5dc2a228db4072ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63EE 5360 bytes
font_01_sfnt_off00007615.bin
ab5821f4857a965f9c6fa113f4e07c1f5fa972b1452abfb721c3f79f5a463df0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7615 10052 bytes

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