Malicious PDF — malware analysis report

Static analysis result for SHA-256 534e76e0419d8dba…

MALICIOUS

PDF

43.6 KB Created: 2020-08-08 13:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa22aa43cb3434599c65c676a7188ca6 SHA-1: 22ece7823cc9a2d2d0f2914cf56379a1fd7ce0dc SHA-256: 534e76e0419d8dba3f453aaef1722aa64090ea242ce7e3bf6b4b2c30abdbe747
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of embedded external links, with the first being 'cdn.shopify.com/s/files/1/0430/4666/6389/files/90951774672.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to a potentially harmful site.

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=tulang+alveolar+adalah+pdf
    • http://files.refugecl.org/uploads/1/3/1/4/131406749/sajuwe.pdf
    • http://files.smealliance.org/uploads/1/3/1/4/131407179/zeniko.pdf
    • http://lajuno.worldvision.com.sg/uploads/1/3/1/4/131483254/2268278.pdf
    • https://cdn.shopify.com/s/files/1/0430/4666/6389/files/90951774672.pdf
    • https://cdn.shopify.com/s/files/1/0435/2068/8282/files/alcohol_phenol_and_ether_mcq_for_neet.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/pidikosakusoxivomurok.pdf
    • https://cdn.shopify.com/s/files/1/0431/9333/5970/files/abnormal_psychology_disorders.pdf
    • https://cdn.shopify.com/s/files/1/0435/7668/8799/files/famotagojitor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5227/7670/files/xegenozenerujezudape.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2852/files/6351535921.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1063/files/aluminum_extrusion_design_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7909/files/countries_dropdown_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/tavejalogo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4229/0336/files/transistor_cross_reference_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2634/files/lerowadow.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/
    • https://cdn.shopify.com/s/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d66.bin
e11de23c746d1f037a94206020926d2d7867fac7705f6e5d72a78aa1ed3df55e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D66 5132 bytes
font_01_sfnt_off00007ee3.bin
8ef226ac1093ddbf1257481724cefbdcddda35db0a26c2b48ffb8fd7cce1bdbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE3 10140 bytes