Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c7b348353e081b…

MALICIOUS

PDF

50.1 KB Created: 2020-08-12 04:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dae1f9c906008c9a983ee74aa8db81d6 SHA-1: 4dab73ec809b4111e5433bd3af3c981ec650c50d SHA-256: 95c7b348353e081b8729325bd8747bdc26945f1dfe2b5ab876fc5ba3d57869cb
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.cc) which is presented to the user as a 'Pan card application form'. The ML classifier also strongly indicated maliciousness. The document body contains the malicious URL, reinforcing the lure.

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.cc/pify?keyword=pan+card+application+form+in+pdf+file
    • http://files.creativeonlineservices.com/uploads/1/3/2/7/132740187/4709952.pdf
    • http://files.dummart.org/uploads/1/3/2/6/132682739/3d9f80174fd.pdf
    • http://files.stealthentertainment.net/uploads/1/3/2/6/132682030/zedipibabuguvinogiri.pdf
    • http://vivot.mightyandmessylife.com/uploads/1/3/1/8/131856772/jotuzilemu_gejoxarekut_munebore_pumotal.pdf
    • http://files.wearewnc.org/uploads/1/3/0/9/130969061/duvogado.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/article_grammar_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0431/5879/8492/files/meningite_bacteriana_pediatria_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/faderulanuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/neruzibutogetifupajive.pdf
    • https://cdn.shopify.com/s/files/1/0427/7266/0390/files/90693331437.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/zedulawepav.pdf
    • https://cdn.shopify.com/s/files/1/0431/3337/0522/files/periodo_arcaico_en_america.pdf
    • https://cdn.shopify.com/s/files/1/0448/4520/3618/files/peramupotut.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/allegory_and_representation.pdf
    • https://cdn.shopify.com/s/files/1/0431/2865/1938/files/13262312347.pdf
    • https://cdn.shopify.com/s/files/1/0434/3827/6760/files/understanding_business_ethics_stanwick_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9607/0560/files/92498737382.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_off00006e63.bin
5781971b77d854f2214efb70a1dd07d057efbe902dccd46913c3405f871a20bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E63 4912 bytes
font_01_sfnt_off00007eed.bin
c980867558975418855045677802e886bb6e20d94a83db9ebbe2e736dc4dc5d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EED 14448 bytes
font_02_sfnt_off0000ac9f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC9F 4324 bytes

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