Malicious PDF — malware analysis report

Static analysis result for SHA-256 5197bdce129a6ea8…

MALICIOUS

PDF

51.8 KB Created: 2020-08-13 23:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d08497cdc8f0cb8a2352b747242fad58 SHA-1: 2ae2b5a0360de6afb63fe79b306153195bbdb011 SHA-256: 5197bdce129a6ea8245cc3429ab170fc10c826e4b20a429aeb69d215adbec36f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, disguised as a search result for 'Call of Duty app store'. This redirector likely leads to further malicious content or exploits. The PDF also hosts a large number of external links, many pointing to Shopify, which is characteristic of SEO-based link farms used to manipulate search engine results and distribute malware.

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=call+of+duty++app+store
    • http://files.scrap-eechickdesigns.com/uploads/1/3/0/7/130739719/5708155.pdf
    • http://files.pigstybully.com/uploads/1/3/1/3/131383045/binemifu_jefoxage_firapopetag_dopikofu.pdf
    • http://pituroner.themidnightstroll.com/uploads/1/3/0/7/130776485/d5ad9e5276b.pdf
    • http://files.thewindingsheetoutfit.org/uploads/1/3/1/8/131871740/pojufuf_vepezu.pdf
    • http://naxale.shoprivervalley.com/uploads/1/3/1/1/131163599/1237351.pdf
    • https://cdn.shopify.com/s/files/1/0430/5479/2866/files/apqp_manual_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/3400/8987/files/campbell_s_biology.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/paketopavaduvigexesivisu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/24935478170.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/adjective_words_with_tamil_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0430/6114/9850/files/27299480246.pdf
    • https://cdn.shopify.com/s/files/1/0433/1805/0984/files/pesofevo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6809/4629/files/15560960765.pdf
    • https://cdn.shopify.com/s/files/1/0436/8115/3177/files/zewef.pdf
    • https://cdn.shopify.com/s/files/1/0429/7595/3049/files/zebusalufimewidepisibape.pdf
    • https://cdn.shopify.com/s/files/1/0432/5897/0280/files/17622853457.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/27853607402.pdf
    • https://cdn.shopify.com/s/files/1/0431/3455/0177/files/gate_2020_mechanical_question_paper_with_solution_made_easy.pdf
    • https://cdn.shopify.com/s/files/1/0433/3817/0523/files/aircraft_mechanical_systems.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/27299553775.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e76.bin
92ca680baaf978b6150165b99831abc84e67ec7ccbb8a4360b04c4d2aa8c9963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E76 4888 bytes
font_01_sfnt_off00008f3a.bin
6c2cb205ba5060b018e5bb939a3744db26c3006b7dbc919167969e1f62ed31f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3A 10732 bytes
font_02_sfnt_off0000b3d5.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D5 4324 bytes

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