Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e58c8b190e81faf…

MALICIOUS

PDF

43.1 KB Created: 2020-08-20 08:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 504d37d5bdf552392563a35057297938 SHA-1: 1f64a1100ad3bff3e12cadc11b82a4a3da530012 SHA-256: 5e58c8b190e81fafc26e59dea4c002f54bd7ee81be1084ed18026e775b8ecc30
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one pointing to a known malicious redirector infrastructure. The document body, though partially corrupted, includes the same malicious URL, suggesting an attempt to trick users into visiting it. The presence of a large number of external links, many hosted on Shopify, indicates a link farm designed to manipulate search engine results.

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.ru/pify?keyword=bosch+tassimo+manual+red+spray+light
    • http://files.insolitours.net/uploads/1/3/0/9/130968950/3893551.pdf
    • http://penebeza.alexrawfootage.com/uploads/1/3/0/7/130775162/9320638.pdf
    • http://mexulak.clarkstownreformedchurch.org/uploads/1/3/0/8/130874493/xoxitutob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2447/4531/files/33052192505.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/comparing_and_contrasting_characters_i_ready_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/1798/4405/files/20872487274.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/negodigufonug.pdf
    • https://cdn.shopify.com/s/files/1/0431/0096/2977/files/karixudasokeserinov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdf
    • https://cdn.shopify.com/s/files/1/0433/9462/9786/files/codeware_compress_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/8070/3382/files/64206825537.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/aruna_asaf_ali_biography.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/python_challenge_level_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/4685/5078/files/geditarokufowuxuwaxodubod.pdf
    • https://cdn.shopify.com/s/files/1/0431/3979/3050/files/wisibibawojapowibavotuf.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/ncert_maths_book_download_for_class_8.pdf
    • https://cdn.shopify.com/s/files/1/0434/7753/2824/files/data_warehouse_tutorial_download.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_off00006a8a.bin
d92245304fa4f60f719f924cc7974f503a2062d9669e5c7239acd20cf752fdab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8A 5636 bytes
font_01_sfnt_off00007d95.bin
3d967c2f446c27ed9909a13f5e8280612af5be12f65c9dd0da11bb4ac61be1b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D95 9912 bytes

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