Malicious PDF — malware analysis report

Static analysis result for SHA-256 43601f49b7d30125…

MALICIOUS

PDF

46.1 KB Created: 2020-07-23 16:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: c7a34d00edc9d2ffb32b7ef949195b58 SHA-1: c8771f7a6087dc175e89365c48883f2fcff7705c SHA-256: 43601f49b7d301252fd8b61e46f36522da753bedb9b0ebfb582676e284bb56e5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of a link farm suggests an attempt to lure users to external sites, potentially for phishing or malware delivery. No scripts were extracted, limiting the analysis of specific payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=pentax%20ist%20film%20camera%20manual In PDF document text
    • http://files.greenstonedoors.co.nz/uploads/1/3/1/8/131857402/2586484.pdfIn PDF document text
    • http://files.raycaesar.com/uploads/1/3/0/9/130969459/pamonagusobuxijim.pdfIn PDF document text
    • http://files.hsunico.com/uploads/1/3/0/9/130968937/2938797.pdfIn PDF document text
    • http://files.bellcurvededucation.com/uploads/1/3/2/7/132710565/pegibifalukeravabin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/netidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6332/8411/files/64385426867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/puzavewifexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/buvalamokexig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0360/0286/files/57700851715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9141/8518/files/97274515939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/vidibesipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0006/2371/files/guzevimeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8208/7588/files/zonim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/paxokaxizoxovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3738/2040/files/wivevexagowadakizujo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F6 4868 bytes
SHA-256: 0f573f8c738b596fc187bd7ab843885813fac305848eaf783156207b35151531
font_01_sfnt_off00008761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8761 10536 bytes
SHA-256: 25db120c018e9f8dcde764ab483b2cc7a2642315752b422f925501c11b3d6b64

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