Malicious PDF — malware analysis report

Static analysis result for SHA-256 025a0736e009a96d…

MALICIOUS

PDF

119.4 KB Created: 2020-08-06 06:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a58aec3bd514ec4013ba5abf8f070e89 SHA-1: 56055b4a392aa615071e621990e254926928ce81 SHA-256: 025a0736e009a96d266e3eb9b559fb5613e4c8532efa891cda51f5c1108b8e1a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a lure to disguise the malicious intent. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this file is part of a phishing or spam campaign.

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=secondary+metabolites+in+plants+pdf
    • http://files.irmoepta.com/uploads/1/3/0/9/130969659/9010348.pdf
    • http://files.dreampartiesnl.com/uploads/1/3/0/8/130874566/pisuxalaz-rirotiduki.pdf
    • http://files.sbednarski.net/uploads/1/3/1/4/131452740/fafunebo-bagobifejolofi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/7956/3432/files/length_measurement_units.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/legugimaxedaxumovuva.pdf
    • https://cdn.shopify.com/s/files/1/0450/7097/5128/files/bharathiyar_kavithaigal_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/namimijotifowu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3929/1554/files/tubimuporovijovosenelak.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/1664187201.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2674/files/zidewebojopuma.pdf
    • https://cdn.shopify.com/s/files/1/0434/3729/3718/files/pefosisenujodewado.pdf
    • https://cdn.shopify.com/s/files/1/0437/9826/6016/files/roger_kamien_music_an_appreciation_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niroduwo.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000178be.bin
2fa989a3267ae0f184e197e9e2e3762b89c664ec6220b965979e8561d8bb0e34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x178BE 5644 bytes
font_01_sfnt_off00018be1.bin
1fe4181aec73e349f2ea826a5b2b9c9e1b9378d621ce77ca1d82c76df8592c4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18BE1 14940 bytes
font_02_sfnt_off0001baa7.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BAA7 16204 bytes

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