Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a60e66d44587bcd…

MALICIOUS

PDF

56.3 KB Created: 2020-10-29 22:23:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a58f23ccd664193d43540ec3795a606f SHA-1: e75ab63644ea2b0c4a1a0bb97060fcc219865783 SHA-256: 6a60e66d44587bcd461a1ee926f213dae339f70393561647399763a07f9c0ac5
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as a free download resource, leveraging SEO tactics to attract users. It redirects to a malicious infrastructure at 'ttraff.me' which likely serves as a gateway to further malicious content or phishing pages. The presence of embedded URLs and the heuristic firings strongly indicate a social engineering attempt to trick users into clicking malicious links.

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.me/pify?keyword=dld+book+pdf+free+download In PDF document text
    • https://wudemivezetuf.weebly.com/uploads/1/3/4/3/134318680/40d973.pdfIn PDF document text
    • https://gixapogaruxa.weebly.com/uploads/1/3/4/3/134331356/2058936.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/bulozor/88182717284.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9820/5077/files/15149698494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f96a8c-03df-404f-84d9-dad890385e12/misirarez.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/92330337235.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/bosquejos_para_predicar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdf0b3ba-0ace-4e0d-ae53-26dbf81d5433/90867381729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8906/0551/files/nouvelle_vie_pierre_bordage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d026ed07-6aea-4acd-8849-d8f7ae217371/libro_trigonometria_de_granville.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad8beb04-a59f-4bc5-b85f-37ddc3bedaa7/26137276809.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/vekunazuwiwopimixomu.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/logical_reasoning_questions_and_answers_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/long_run_supply_curve.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

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000674d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x674D 2952 bytes
SHA-256: cb9072f881c1fe0ad8900bbcc5a20a23fabb306412f64e001cac76c2a9509f2c
font_01_sfnt_off000071dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71DC 4812 bytes
SHA-256: 72c5f4b77434a0a518bd596c09a2b00ccf6b28f7c022bba91554fc2f288d2fe6
font_02_sfnt_off00008244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8244 2664 bytes
SHA-256: 40d4dbdcc0255b1eff07ae2d61b53bc29a927c1b7aca4abfc6ace0d56ad75950
font_03_sfnt_off00008dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBF 11168 bytes
SHA-256: 4117e27b148af8032bdb392c402f103912837591419282163e0767d27f4c3ad4
font_04_sfnt_off0000b3c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
font_05_sfnt_off0000c1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C6 4252 bytes
SHA-256: dcde69f2fa5c55ebd10f51bd6a1a2857b2adc7137e64b8e9293f24f34da87dd4