Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a6f1b70e3c6768…

MALICIOUS

PDF

65.4 KB Created: 2020-08-25 13:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8bbf1f639d446556c5d53b3fa4ef08a SHA-1: 8d872f91e8b669f3eaad6e6277dc67a3c2fab62a SHA-256: 76a6f1b70e3c67686279fa808e9778fdc7f1c9e8ef1ef1ef75ab679a4fd3cdaf
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Al-Bukhari pdf' and includes the malicious URL. This suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery.

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=al-+bukhari+pdf
    • http://files.ceasefireworld.com/uploads/1/3/2/6/132682039/2045248.pdf
    • http://files.napiercounselling.co.uk/uploads/1/3/0/7/130739537/3e003317776d82d.pdf
    • http://files.protononprofit.com/uploads/1/3/1/6/131606984/b06d256f715.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/6380/3046/files/96748341150.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/gerujenasu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/64470911193.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/cs_go_autoexec_location.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/adobe_rider_7._0.pdf
    • https://cdn.shopify.com/s/files/1/0431/2363/8426/files/renasakepisilino.pdf
    • https://cdn.shopify.com/s/files/1/0428/8321/9619/files/96224299404.pdf
    • https://cdn.shopify.com/s/files/1/0429/2083/7287/files/wavepad_free_softonic.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/bibalivumolizelilo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/lukesevewixiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6400/8610/files/lexirunu.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085ef.bin
2f30ae68e2d20e6fcb5106cd1e76decf4b4af903e700c2a4ec17a5706b70ac06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85EF 4644 bytes
font_01_sfnt_off000095b4.bin
22f1ef7669f0c479205f17e1cc0024757ceb35067fd4c7d31ce6fe19004789d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95B4 17116 bytes
font_02_sfnt_off0000c7af.bin
d5d790309c58b3bb35f75531d12dec6b5c8970fbf1272490d10efc4ad428793a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AF 21204 bytes
font_03_sfnt_off0000ead2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD2 4324 bytes

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