Malicious PDF — malware analysis report

Static analysis result for SHA-256 35c9c174cb74cec8…

MALICIOUS

PDF

42.5 KB Created: 2020-08-11 23:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24d0130ed3554949df6ab598a4adb95f SHA-1: b544dd5317c445988516e1807179e805559869da SHA-256: 35c9c174cb74cec826a66c7b788e01260cff7c28dd2cba482f91ebd19c91c95f
154 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body and embedded artifacts reveal a large number of external links, with at least one pointing to `https://ttraff.com/pify?keyword=hak+ulayat+adalah+pdf`, suggesting a link farm or redirection scheme designed to lead users to malicious content. The presence of numerous Shopify-hosted PDF links, while some are confirmed benign, indicates a broad attempt at SEO manipulation for malicious distribution.

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=hak+ulayat+adalah+pdf
    • http://files.tukatavientiane.org/uploads/1/3/1/4/131409794/dizisamibatodu.pdf
    • http://juvefasum.wrenphotographynd.com/uploads/1/3/0/7/130738970/900d5f5580.pdf
    • http://files.saintlouisspeed.com/uploads/1/3/0/8/130813509/mupajazute.pdf
    • https://cdn.shopify.com/s/files/1/0432/6018/2692/files/55526895571.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/alankar_class_9.pdf
    • https://cdn.shopify.com/s/files/1/0440/6195/0117/files/sogosaxes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bopeberovejaxurid.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/os_atos_institucionais.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/bobcat_853_specs.pdf
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/fedukixu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7569/7830/files/weathering_erosion_and_deposition_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8530/7810/files/6250650843.pdf
    • https://cdn.shopify.com/s/files/1/0433/0776/1819/files/71695003085.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/86065654248.pdf
    • https://cdn.shopify.com/s/files/1/0445/2545/3471/files/how_to_find_joint_from_marginals.pdf
    • https://cdn.shopify.com/s/files/1/0433/0582/8520/files/81786587643.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/fesade.pdf
    • https://cdn.shopify.com/s/files/1/0428/5287/6455/files/pefokowaxanifororifof.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_off000069f9.bin
5cca58c4a75351e5ad5041fd9e82e70d3bcf015e212e81677b8356f584a121db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69F9 4984 bytes
font_01_sfnt_off00007af4.bin
286c323e7e7e8f5d53f41be610e0be7a9c6f86ea96bb9ca0ed9c517edb228f13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF4 9908 bytes

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