Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2ec1ea69fd77ad…

MALICIOUS

PDF

51.1 KB Created: 2020-08-07 18:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de8427a3fb4aafd6be0616540b0e3535 SHA-1: 420d8989a35fb985ba623fca0984060d8fa6f6ac SHA-256: 0b2ec1ea69fd77ad90c251bbf582f633a775f85dd32f66e177af16c2224ee6f0
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into downloading malicious content disguised as educational material. The ML classifier strongly supports the malicious verdict.

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=bse+odisha+10th+class+math+book+download+pdf
    • http://files.formichaellovecynda.com/uploads/1/3/1/4/131453111/munojisofusitatal.pdf
    • http://files.ccjsermonstorage.org/uploads/1/3/1/6/131637419/figonidusip-pixafevijomu-zerigew.pdf
    • http://files.rangienviroartscentre.org/uploads/1/3/0/7/130738673/xewapanisudaludo.pdf
    • http://files.juniorhistorians.com/uploads/1/3/1/6/131606502/xejenudijekew.pdf
    • http://files.identitycrisisundone.org/uploads/1/3/1/4/131483029/e5a7db3836.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/3150/8645/files/65064381180.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4432/files/zusiridemojepire.pdf
    • https://cdn.shopify.com/s/files/1/0431/0273/2448/files/fred_boat_commands.pdf
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/javitinivaxife.pdf
    • https://cdn.shopify.com/s/files/1/0434/3313/2184/files/daxatikokaditesovuloruf.pdf
    • https://cdn.shopify.com/s/files/1/0438/4666/4349/files/yamaha_qt50_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2513/6792/files/23377925904.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rixiridujafogidubiba.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1029/files/79190914.pdf
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/bavodejodov.pdf
    • https://cdn.shopify.com/s/files/1/0433/3617/1688/files/all_interview_questions_and_answers_analytical_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0433/7483/7925/files/rokixorapeta.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2310/files/pedro_caldern_de_la_barca_la_vida_es_sueo.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_off00006724.bin
d7746cb540b5d878dc622e435d6dfbf2bdf5d2ec7d954d2159a31dddeaf63a7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6724 5840 bytes
font_01_sfnt_off00007af7.bin
b8055035deb6bc9b5f3e93e1045a3687cfe8e2322a216c9f249e5cc921540998		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF7 15256 bytes
font_02_sfnt_off0000aa50.bin
3b1167557c0500c78008053c404847a906c4d495ef15adec583fc97e76626070		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA50 16068 bytes

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