Malicious PDF — malware analysis report

Static analysis result for SHA-256 802de231d6028f3c…

MALICIOUS

PDF

60.4 KB Created: 2020-08-09 15:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8c3ee38d470d30e2420f3cd367c7a8d SHA-1: 9b95a1eda25e8090f632a313a44bfdfb4d975274 SHA-256: 802de231d6028f3c48ad9150a4ca1c0abfbc8d47dfc56630a1dd93a8107375b6
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Odisha tourist guide pdf' and the malicious URL, suggesting a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a campaign to drive traffic to malicious sites. The ML classifier strongly supports the malicious verdict.

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=odisha+tourist+guide+pdf
    • http://tekagifa.knife-place.com/uploads/1/3/0/7/130738970/9b464bd1ce.pdf
    • http://files.nadjalitau-photography.com/uploads/1/3/1/3/131381602/8738581.pdf
    • http://files.marycarolsullivanportfolio.com/uploads/1/3/1/8/131871658/mijad.pdf
    • http://files.redyogaannarbor.com/uploads/1/3/0/8/130873851/8594409.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/72954994101.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/73253295839.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/89019159625.pdf
    • https://cdn.shopify.com/s/files/1/0434/7923/6774/files/media_query_css.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/70938781167.pdf
    • https://cdn.shopify.com/s/files/1/0439/8333/9678/files/angielski_czasy_budowa.pdf
    • https://cdn.shopify.com/s/files/1/0437/0271/4536/files/aesculap_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/24279373620.pdf
    • https://cdn.shopify.com/s/files/1/0437/5429/1354/files/38010540379.pdf
    • https://cdn.shopify.com/s/files/1/0430/8258/0130/files/tipos_de_certificados_de_calidad.pdf
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/guligubo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7516/4574/files/bakexerowefesugozugev.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_off0000b090.bin
e0da093f7f34bce4da3fa1dd7179f71d80ead03372b542e2bbfdf619ecab0923
pdf-font-stream PDF embedded font (sfnt) at offset 0xB090 5300 bytes
font_01_sfnt_off0000c28e.bin
082df3d601304c512c42ac4f6de36b9c607c897b5a6aab77e430e3f21a757ab1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC28E 9908 bytes