Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff64d4019f10230…

MALICIOUS

PDF

40.2 KB Created: 2020-07-26 06:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bd61d410602fe1bcf50691e407ef8ab SHA-1: 7937214d287066ea19c4b709bd6329fb8ba4a6e8 SHA-256: 9ff64d4019f10230793760bcd3a97cf3ba0448442c08583cf75d4459cd98c1e8
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with the heuristic PDF_SEO_LINK_FARM indicating a link farm structure. One of the primary links, ttraff.ru, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its direct lure, but the link farm and redirector strongly suggest a malicious redirection attack.

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=bhagya+chakram+movie
    • http://files.wildflourcookie.com/uploads/1/3/2/7/132741144/bebige-rimamigatojebi.pdf
    • http://files.embracingtheimpossible.com/uploads/1/3/2/6/132682528/8234674.pdf
    • http://files.besticandib.com/uploads/1/3/2/7/132741389/muvejotunijema-gataz-wowajasakemi.pdf
    • http://files.4seasonsglobal.com/uploads/1/3/2/7/132740619/641f9.pdf
    • https://cdn.shop
    • https://cdn.shopify.com/s/files/1/0432/0935/9520/files/tekuge.pdf
    • https://cdn.shopify.com/s/files/1/0440/8157/8136/files/58820101243.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/dadopu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5388/files/kavutewezevi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/litajelaxipamuzelaros.pdf
    • https://cdn.shopify.com/s/files/1/0437/1618/2166/files/zexibajaxuritoravu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6437/files/fuwagedobivapodewizugota.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/jagit.pdf
    • https://cdn.shopify.com/s/files/1/0432/3393/5515/files/vuwububakatik.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/kiranofo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060b3.bin
805761f757b492c5e3f092497bc898b1dc26199dd015c9e2cbcf0bae1fbd08c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x60B3 4880 bytes
font_01_sfnt_off0000714c.bin
350bcf050e08f7743fea961271aaf6ae2d4478b30fd19d5381932cd0d00d3f2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x714C 10068 bytes