Malicious PDF — malware analysis report

Static analysis result for SHA-256 324bd2e82ff1aa19…

MALICIOUS

PDF

54.1 KB Created: 2020-08-11 19:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfbb1afffbbc4c734d9995c5f0098d70 SHA-1: bf9f8e0466624a12bd0abfc970bb8342cd20b4b4 SHA-256: 324bd2e82ff1aa19b19f613ab66fe496a31599f8c8217b63b3d9d8ce33ac9eec
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded URLs that point to a redirector service, which in turn leads to a link farm of other PDFs. The primary malicious URL identified is https://ttraff.com/pify?keyword=kundalini+awakening+book+pdf, suggesting a lure to entice users to click on malicious links. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links indicates a potential SEO poisoning or link farm strategy to distribute malicious content.

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=kundalini+awakening+book+pdf
    • http://files.movementdanceandfitness.info/uploads/1/3/0/8/130874015/valalur.pdf
    • http://files.tanawanhandycraft.com/uploads/1/3/0/7/130776245/e029c7.pdf
    • http://files.riverdaleridge.com/uploads/1/3/0/7/130775014/bbc42ec5a22.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/pemukorozina.pdf
    • https://cdn.shopify.com/s/files/1/0429/0769/7305/files/72487546515.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25322908130.pdf
    • https://cdn.shopify.com/s/files/1/0438/4463/2738/files/pannes_diagnostics_auto.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/vinakurafarebiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/16032664263.pdf
    • https://cdn.shopify.com/s/files/1/0448/7023/8370/files/abstract_algebra_by_dummit_and_foote_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gekubamunanapomokavonata.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2411/files/gunifozarepib.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/damadizumobaxe.pdf
    • https://cdn.shopify.com/s/files/1/0447/1973/4938/files/calculus_early_transcendentals_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/72316833669.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/lubovibotokane.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000883b.bin
da1437ee300391ddb7e9464359ea16b086bd05843f5800240f21cfca60e008f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x883B 5000 bytes
font_01_sfnt_off00009956.bin
fe3cfa10af0694ce82758ee601f892eb002e6416eaf969cffa8c4c2f35b02e11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9956 10488 bytes
font_02_sfnt_off0000bd23.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD23 4324 bytes

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