Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a97eb34c9ee1120…

MALICIOUS

PDF

47.2 KB Created: 2020-08-03 15:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa3f0b287e511d98450674452341950f SHA-1: 1764fbb388b29521a1b419a933ec2dd3c1a30f06 SHA-256: 5a97eb34c9ee1120dcb774a09229b17d1b6991247bab150edbbcd8d3d373fa9a
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL containing 'athlean x meal plan pdf', suggesting a lure. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external links, including one to a known malicious redirector, indicates an attempt to lead the user to a harmful destination, likely for phishing or malware delivery.

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/wb?keyword=athlean%20x%20meal%20plan%20pdf
    • http://files.beaconforlife.com/uploads/1/3/1/0/131070938/gamegolo-rotozamewanof-xosuwokarud.pdf
    • http://files.sfboys1915gallipoli.info/uploads/1/3/1/4/131455621/24a816e0100.pdf
    • http://files.integrityworks.info/uploads/1/3/1/0/131070459/5519815.pdf
    • http://files.awakeningcenter.net/uploads/1/3/1/3/131380126/09a098184a8f3.pdf
    • http://files.epaa.org/uploads/1/3/0/9/130969356/7491ded.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/5302/1334/files/jemerupeteziliwisijinos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/33279145905.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/pesefalorazilemuwefugav.pdf
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/58924019222.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/zubivepomeguxozete.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9295/files/complex_variables_and_applications_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/6440/9764/files/12367988471.pdf
    • https://cdn.shopify.com/s/files/1/0430/6000/2967/files/pathfinder_book_of_the_damned_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/3123/0614/files/precalculus_with_limits_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0440/4169/9478/files/94490530776.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/kitewaradadaragipana.pdf
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/print_python_version.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_off00007c50.bin
58244e278301e4a02faa8a73d7eab28f1c66a166ebeb26fc4afa7655eb6d67b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C50 5064 bytes
font_01_sfnt_off00008d6e.bin
b5b9f8d8a55a55f5b5a45b8414cdc99fd2ca9295cff79e7937d050236d97b453		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6E 9944 bytes

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