Malicious PDF — malware analysis report

Static analysis result for SHA-256 09eb77f6837e7a1c…

MALICIOUS

PDF

41.5 KB Created: 2020-08-01 14:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f815648a002d27a3617fe82cfd663c5b SHA-1: 69c02b9926e6c74a4d70c6c4db4c12c3ca9b1e88 SHA-256: 09eb77f6837e7a1cc9793f7bef29ab10d1634526024414659f0d3d84cc8cceb9
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=ingersoll+rand+air+dryer+manuals+pdf, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to the same malicious URL, suggesting an attempt to disguise the malicious intent.

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=ingersoll+rand+air+dryer+manuals+pdf
    • http://files.naturecoastladyanglers.com/uploads/1/3/1/8/131856352/wirixunilog-nobafobun.pdf
    • http://files.cantikjewelry.com/uploads/1/3/0/7/130740510/6583965d3c48294.pdf
    • http://files.spiritcreekfarm.com/uploads/1/3/1/3/131384436/9062587.pdf
    • http://files.themassageplacesp.com/uploads/1/3/1/4/131410234/1072164.pdf
    • http://files.troop502iop.com/uploads/1/3/0/9/130969408/galawudaf-fisojidowulem-xijibosesanozo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/1364/3167/files/fikepanojipawe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2767/6829/files/81722687841.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/77647256708.pdf
    • https://cdn.shopify.com/s/files/1/0437/1664/0923/files/juwururazuwuxiziwivaxozuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kikurum.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3478/files/ragiwuzed.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/33034963112.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/92161478626.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21086069096.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8730/files/pumeralar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tefukina.pdf
    • https://cdn.shopify.com/s/files/1/0428/5304/0295/files/goxoparojajomunob.pdf
    • https://cdn.shopify.com/s/files/1/0429/4213/6476/files/kojagonowani.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_off00005593.bin
087ad9d627547981a35e17040444fdb6ca102e4db05e9db1ccca8dc66ebf6a83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5593 5204 bytes
font_01_sfnt_off00006725.bin
61c17c123ab32d2378d385fa6eacfb0ad744f63f6cb9d96f94614f9cb1485836		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6725 10336 bytes
font_02_sfnt_off00008a5a.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5A 4324 bytes

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