Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c78a46211fd22f1…

MALICIOUS

PDF

55.2 KB Created: 2020-08-05 05:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6d332f5c2d7c5dedc847a97edee351e SHA-1: a33f2fb6e96c6d622efb95613f497c67b736137c SHA-256: 6c78a46211fd22f10ab860e20946082f86bc29bb9d5283df4bb0b853c56d60bf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to potentially malicious redirector infrastructure. The primary malicious link identified is https://ttraff.com/pify?keyword=public+administration+and+management+in+south+africa+pdf, which is flagged as a known malicious redirector. The document's structure suggests it is designed to act as a link farm, attempting to trick users into visiting these external sites.

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=public+administration+and+management+in+south+africa+pdf
    • http://files.fallline.org/uploads/1/3/1/8/131871977/vawujupukobogivizoti.pdf
    • http://files.copernicus-training.com/uploads/1/3/1/8/131871745/4288664.pdf
    • http://files.nducuwangugi.com/uploads/1/3/0/9/130969555/gimuviri-megatanizus-selusifo.pdf
    • http://files.thetruthhemp.com/uploads/1/3/0/8/130813458/d3834f5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6395/7918/files/13220839477.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/xopekuteposulika.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2511/files/xadixogavixevodi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wopeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/fiwoparoduguferidubejelod.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0064/files/fudosaguxakifeputinapon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rerotapok.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/rubewijogesamonavurires.pdf
    • https://cdn.shopify.com/s/files/1/0431/2776/7206/files/20584009699.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13002849425.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/kifepetalawosapolem.pdf
    • https://cdn.shopify.com/s/files/1/0437/1264/3223/files/cub_cadet_ltx_1045_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6224/7067/files/63709013301.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_off0000989e.bin
060f28f5b3a501c618c5df7d80499425b1eb4e22f7f6621a9fccabcf9d6a0ee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x989E 5712 bytes
font_01_sfnt_off0000abdb.bin
4749e1f2fd7c50d5adffa050e6b48c9afd12e35b0f0addc4173f25bcbcef61b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABDB 10540 bytes

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