Malicious PDF — malware analysis report

Static analysis result for SHA-256 d570971f886f2c9b…

MALICIOUS

PDF

42.2 KB Created: 2020-08-10 13:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da593a24c5503d79426c9bce64f9bd4d SHA-1: 2339c58444d76740d2b7e962e326a4a4cb240c2a SHA-256: d570971f886f2c9bcd43c52583107cb39fe5e4e0942a7a937b1c72fa48d2aaa0
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=air+cooled+condenser+working+principle+pdf'. The document body and embedded links suggest a tactic of creating a link farm, likely to obscure the final malicious destination and potentially engage in SEO poisoning to lure victims. No scripts were extracted, but the PDF structure itself is weaponized to facilitate redirection.

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=air+cooled+condenser+working+principle+pdf
    • http://files.bathcantatagroup.co.uk/uploads/1/3/2/6/132696117/13d7014c63f.pdf
    • http://files.thedaimlerxjcollection.com/uploads/1/3/1/4/131453252/domenigapopite-lisujutoneg-tuwep.pdf
    • http://files.academyofhirudotherapy.org/uploads/1/3/1/3/131379040/34780cc3971ea.pdf
    • http://files.pipekeepers.org/uploads/1/3/0/9/130969452/e999b6bc2ba2ae7.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6484/files/boduxagatelimijigipis.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/milk_adulteration_project.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/15249874331.pdf
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/10152964857.pdf
    • https://cdn.shopify.com/s/files/1/0435/9458/0136/files/9630496495.pdf
    • https://cdn.shopify.com/s/files/1/0429/1664/2975/files/accounting_theory_grade_12.pdf
    • https://cdn.shopify.com/s/files/1/0434/5338/2822/files/alter_ego_2_cahier_d_activites.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/pogofev.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7205/files/modern_biology_textbook_9th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/revowabuxomu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/data_analysis_open_source_tools.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_off000067cd.bin
4772f6903568c15b5be61108d61d524985f34527b103f01fa4852d50d79b6a3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67CD 5260 bytes
font_01_sfnt_off000079ce.bin
134e299a14ce1325a69a75e2937e40f64be037b81475d76cb5d27eef7ea88709		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79CE 9992 bytes

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