Malicious PDF — malware analysis report

Static analysis result for SHA-256 5edeb7a8bd59bafb…

MALICIOUS

PDF

65.2 KB Created: 2020-08-10 05:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc481aaa27f3e896bc804bcd78d60ae1 SHA-1: 28aadea1d125f6f2362d22c1d4038bacf685b8e1 SHA-256: 5edeb7a8bd59bafbf4cc783d25c5a0cbcd3d35cc096f18b41b1effb37bbbd6c6
154 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document body contains a link to 'https://ttraff.cc/pify?keyword=adventist+hymnal+pdf', which is likely intended to redirect the user to a malicious site. The presence of numerous other PDF links suggests a link farm or a mechanism for distributing further malicious content.

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=adventist+hymnal+pdf
    • http://files.jjenterpriseslcd.com/uploads/1/3/1/3/131379939/1893953.pdf
    • http://files.bctstudentassociation.org/uploads/1/3/1/3/131380600/zazurabere.pdf
    • http://rezajuz.lililalune.com/uploads/1/3/2/6/132682883/a101109.pdf
    • http://files.regalialifestyle.com/uploads/1/3/1/8/131857847/mirifirezew-kutozisomuzopuv.pdf
    • http://files.yanncornil.com/uploads/1/3/1/1/131164081/2427172.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1887/8114/files/bilingual_dictionaries.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5868/files/va_form_10_5345a.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/kedazujunifobikesewoz.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/99123531914.pdf
    • https://cdn.shopify.com/s/files/1/0436/0480/3746/files/1267198708.pdf
    • https://cdn.shopify.com/s/files/1/0429/0949/9548/files/human_anatomy_and_physiology_lab_manual_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/tufomunewazawirasagiloxes.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6554/files/23238037294.pdf
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/sebezo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/ice_station_matthew_reilly.pdf
    • https://cdn.shopify.com/s/files/1/0437/1821/3797/files/african_american_english_a_linguistic_introduction.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab4f.bin
0dc905e066dcb155b8d1d6f5fc530422a7252d98e08ca3603c1308d9907c03a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB4F 5336 bytes
font_01_sfnt_off0000bd56.bin
a7a788d406a07778fec6b3b37dc267eb2cbf354a12d54c1a45e84b7b92b97ab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD56 4532 bytes
font_02_sfnt_off0000c9e5.bin
23f1976fb2782a8f9f227e492714bfabe6d6d7f936330db4c0c4b8427eb9b2b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E5 14828 bytes

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