Malicious PDF — malware analysis report

Static analysis result for SHA-256 720ea38ff5d7306b…

MALICIOUS

PDF

40.9 KB Created: 2020-08-06 13:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45512af68c56988fc20e2c3e224fb538 SHA-1: a2f94b92c69236ed0f8dcaa6e9843ac53e7cf804 SHA-256: 720ea38ff5d7306b5040a4e1682659206f658b9fd0a636f589838d7bf12b4b30
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though malformed, contains text suggesting it is a lure for a PDF download, specifically mentioning 'Irrigation and water power engineering by punmia pdf download'. The presence of many external links, including benign ones, suggests a link farm or SEO poisoning tactic to increase visibility. The primary malicious URL is https://ttraff.com/pify?keyword=irrigation+and+water+power+engineering+by+punmia+pdf+download.

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=irrigation+and+water+power+engineering+by+punmia+pdf+download
    • http://files.refinedblinds.co.uk/uploads/1/3/0/8/130874495/9015ed2ce9.pdf
    • http://files.simplyhairandbeauty.com/uploads/1/3/0/7/130775677/95ae54c.pdf
    • http://files.ilspiritofficials.com/uploads/1/3/2/7/132740711/pidulu.pdf
    • http://files.amandamarkle.com/uploads/1/3/1/8/131871484/jusurinasolalere.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/juzexesowarut.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7569/files/14236150431.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/bogunoniwuzowuzenulofip.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0597/files/ordinary_annuity_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/4044/8407/files/10083548159.pdf
    • https://cdn.shopify.com/s/files/1/0428/4314/4359/files/bumasanazid.pdf
    • https://cdn.shopify.com/s/files/1/0438/3545/7696/files/irritable_bowel_disease_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0433/9095/9766/files/avery_5167_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/1304/5398/files/mazda_3_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/9853/6091/files/36682891770.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/sisowefirutomelidegudox.pdf
    • https://cdn.shopify.com/s/files/1/0439/3543/2859/files/18156221681.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_off000056e7.bin
e5c72bc545ccaf27de2ecdfebfc0fc4cb22bd80b010b5e35c8eb65adc1407a06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56E7 5452 bytes
font_01_sfnt_off0000696d.bin
89454d8ece1be00d2333aac76955f46ed17c4d141322e635bf27f42efb43e54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x696D 2116 bytes
font_02_sfnt_off00007339.bin
e783eb9506d1696945c6dd00df6f5188572417fc9923ec756fadaf83a86bcae7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7339 10216 bytes

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