Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f28b1592e0d2038…

MALICIOUS

PDF

34.0 KB Created: 2020-08-13 09:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5f71793119a56d3ff3e22d5d396170a SHA-1: 54413e301332ff78ec9025be0b7adee2f5e5e180 SHA-256: 0f28b1592e0d2038331b097509350563fd8ae6c991deae35b0ba8e30dd13725f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=administracion+de+la+cadena+de+suministro+sunil+chopra+pdf'. This indicates the document is designed to redirect users to malicious sites. No scripts were extracted, but the presence of malicious links is sufficient evidence of malicious intent.

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=administracion+de+la+cadena+de+suministro+sunil+chopra+pdf
    • http://files.gopremio.com/uploads/1/3/1/1/131163747/matumuvirapa_jujelawis_dilefutanobire.pdf
    • http://files.gorksgoodfilla.com/uploads/1/3/0/8/130815228/3290323.pdf
    • http://files.sweetnelsons.com/uploads/1/3/1/4/131406258/402c292be8f364.pdf
    • http://files.dancetalentcompetition.com/uploads/1/3/1/3/131378838/734e438.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/8377/4614/files/muleri.pdf
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/how_to_make_discord_louder.pdf
    • https://cdn.shopify.com/s/files/1/0448/0555/4337/files/synchronous_motor_applications.pdf
    • https://cdn.shopify.com/s/files/1/0448/2092/2528/files/shawn_mendes_senorita_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/0017/6544/files/dagosifivubadufelokaxob.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/ancient_armory_power_cell_locations.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wadilizesiwegokadokepub.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/49813739663.pdf
    • https://cdn.shopify.com/s/files/1/0432/3924/3943/files/76976533160.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_off00004694.bin
63ee76ca12062c81bce8f977dab6b917829fad6f8ebd4d0a8d916322c164e1de
pdf-font-stream PDF embedded font (sfnt) at offset 0x4694 5384 bytes
font_01_sfnt_off000058ad.bin
55341c55d20a25d728bf8b8018cd22be89043d8b2284bf8a6c4b6140392743d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x58AD 9932 bytes