Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0aeeead4d15e07…

MALICIOUS

PDF

44.0 KB Created: 2020-08-08 02:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 185e4aa087bdbdd6fa06b9848d404169 SHA-1: f8bee326a4b6ef3b83507e2e26b48a89ccf4ae16 SHA-256: 2d0aeeead4d15e0768f454b5d03604185d8cfa8c437c7c2115485df0caa11442
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though obfuscated, contains text related to downloading a PDF, and the primary URL points to a redirector designed to lure users. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=harper+medical+biochemistry+free+download+pdf
    • http://files.voxibc.org/uploads/1/3/0/7/130740213/bawiwolerofuka-winamakunire.pdf
    • http://files.torgersonkickingpunting.com/uploads/1/3/1/4/131453526/porekukivapor.pdf
    • http://files.hellokels.com/uploads/1/3/0/8/130813420/tirisuj-nerogiro-momakanom.pdf
    • http://files.heretohealthwellnessclinic.com/uploads/1/3/2/7/132740214/1678021.pdf
    • https://cdn.shopify.com/s/files/1/0450/5042/9598/files/la_jolla_shores_weather.pdf
    • https://cdn.shopify.com/s/files/1/0432/4740/3168/files/sijabijiju.pdf
    • https://cdn.shopify.com/s/files/1/0432/3760/5544/files/51737440778.pdf
    • https://cdn.shopify.com/s/files/1/0438/7300/9819/files/52175391681.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/82413543284.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56802730071.pdf
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/30533556765.pdf
    • https://cdn.shopify.com/s/files/1/0435/3975/9255/files/cardiomegalia_infantil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67257536452.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/sepabuzikodowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4069/3662/files/git_submodules_init.pdf
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/ff14_overlay_plugin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.pdf
    • https://cdn.shopify.com/s/files/1/0432/0958/8897/files/21862359420.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_off00006ba7.bin
2829348f47d93affb61dd3c3e1b9cc89439417ea99fcf096be864a7c2bf5b4d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA7 5688 bytes
font_01_sfnt_off00007ee1.bin
52e94ee8eb37595bd0320b1d4eb11d5c2f26bc6c0abab933ec50fadff23f5c39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE1 10328 bytes

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