Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e66270b5419a695…

MALICIOUS

PDF

39.2 KB Created: 2020-08-11 16:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4db8b08fb9cb21e6ad7bafdb77716531 SHA-1: 76a25d5c32075d369b218699151d896853d24369 SHA-256: 5e66270b5419a6955dccb1ca97e3e962eb6015308d99d9d081c0c75642b2d40f
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 benign Shopify URLs, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The document body, though heavily obfuscated, contains a reference to the malicious URL, indicating an attempt to lure users to a potentially harmful site.

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=le+verbe+avoir+et+etre+exercices+pdf
    • http://files.warfenburg.com/uploads/1/3/0/8/130874510/zokojulisoj_timijovisegito_lowubinarix_ruled.pdf
    • http://files.falconecreationsinthemaking.com/uploads/1/3/2/8/132814305/kurilebigipaloteli.pdf
    • http://files.simplygoatsmilk.com/uploads/1/3/0/7/130776680/pexojefik.pdf
    • http://birav.stonehillcommunity.org/uploads/1/3/2/6/132683014/1041990.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/1670/5432/files/vampire_diaries_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0433/2532/5465/files/82652839865.pdf
    • https://cdn.shopify.com/s/files/1/0432/0532/9064/files/72415485327.pdf
    • https://cdn.shopify.com/s/files/1/0430/7674/7413/files/bipolar_disorder_1_and_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/81337501500.pdf
    • https://cdn.shopify.com/s/files/1/0432/4782/9156/files/36122070456.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/punuwenofezovojefarenom.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/icy_veins_hunter_leveling.pdf
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/sam_hyde_paradigm_shift_script.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/jokexidatebodobifun.pdf
    • https://cdn.shopify.com/s/files/1/0431/0669/7367/files/jukezifabegezupomaju.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5290/files/51344350656.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_off000056be.bin
1036a15da58c26aefb4848960dbe145d5df889b748b3bc680632d01fcbbdcd78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56BE 5328 bytes
font_01_sfnt_off000068f0.bin
8b386d5b6a3e562cdc6dd691aa7c46d03abcd272f3eaa46b7edc7eb1d09b43b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F0 11524 bytes

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