Malicious PDF — malware analysis report

Static analysis result for SHA-256 69339d28ebdd557d…

MALICIOUS

PDF

44.5 KB Created: 2020-08-06 08:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b15f203806407aaaee051678f837b9e SHA-1: 11bd942a0e8a679c0ad9f76ed62e616ab6396178 SHA-256: 69339d28ebdd557d63efaef3f959449f822b53088dd17d526b877b9491c6fd54
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a link farm, embedding numerous external links, with one specifically pointing to known malicious redirector infrastructure. The ML classifier strongly indicates maliciousness, and the presence of many PDF links suggests an attempt to manipulate search engine results or redirect users to harmful content. No scripts were extracted from this sample.

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=theological+anthropology+a+guide+for+the+perplexed+pdf
    • http://files.artemisiaherbals.net/uploads/1/3/1/0/131070327/3da0bfe99697c1.pdf
    • http://files.oraclefitness.com/uploads/1/3/0/7/130739826/887303.pdf
    • http://files.kibafreemanart.com/uploads/1/3/1/8/131871902/6794927.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8515/9845/files/faked.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdf
    • https://cdn.shopify.com/s/files/1/0433/3525/4171/files/luriwageregasadobajoro.pdf
    • https://cdn.shopify.com/s/files/1/0432/0234/7168/files/dedojenumegovita.pdf
    • https://cdn.shopify.com/s/files/1/0433/1474/1413/files/89687666113.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/669297692.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2646/files/60045288787.pdf
    • https://cdn.shopify.com/s/files/1/0429/8879/8111/files/42510373959.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/bobcat_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0437/0549/9801/files/wupozibijo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3526/1085/files/7_days_to_die_spring.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9908973296.pdf
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/84832268924.pdf
    • https://cdn.shopify.com/s/files/1/0433/8250/5628/files/airmen_y_group_previous_year_paper.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_off0000655d.bin
d3a61a07964a58100b4b4641322791fb8e080a54b5b5e9a43de0ba53846a3f1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x655D 5356 bytes
font_01_sfnt_off000077a6.bin
4dc92bc43083837b98b775c98bcfac8c6025aeaccba033d0f7550859271dd261		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A6 14304 bytes

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