Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b4e6d0b6c394f2…

MALICIOUS

PDF

45.2 KB Created: 2020-08-11 00:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 029144c52ed924fef17024b66a4ddb20 SHA-1: 422c3e05983903b9193a1f6b795e1f847e004e80 SHA-256: 06b4e6d0b6c394f25b11bd2364274339b14ed94b6513528c8c8f462ffd2222d7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link disguised as a document download, aiming to lure users to a malicious site. The ML classifier strongly indicated maliciousness, and the PDF structure includes numerous external links, suggesting a link farm or redirection tactic. No scripts were extracted, but the embedded link is the primary threat vector.

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=descargar+acuerdos+de+paz+guatemala+pdf
    • http://files.esthergoldberg.net/uploads/1/3/0/7/130775084/ninirekewifa.pdf
    • http://sajij.amansbistro.com/uploads/1/3/1/1/131164243/ec148f08705.pdf
    • http://files.wesleytbrown.com/uploads/1/3/1/4/131438274/lapifi_wirajozo_xikalagada.pdf
    • http://files.picturesqueartphotography.com/uploads/1/3/0/7/130775888/5f66e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/41712212800.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2332/files/20294142832.pdf
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/80240217651.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/movikulewerudazuxedo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1725/4558/files/59736694993.pdf
    • https://cdn.shopify.com/s/files/1/0434/2395/7144/files/cedar_rapids_kernels_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/revewarosuxexekadezipu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1029/files/bozatetatepezekemumatuto.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/pusisigezedidufatipe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/73028890335.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45484104345.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/67793163395.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9561/files/89737891689.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/mudenutekigeje.pdf
    • https://cdn.shopify.com/s/files/1/0428/7712/4774/files/92707340231.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071db.bin
7d80bcbd45a5ac3109fea1e6af66104b47b1c5618350757cfc22bd35191c1c26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DB 5524 bytes
font_01_sfnt_off0000849a.bin
79922f1fae7b854bac51c0fb88fb0d70ffc481221399541dbce37e8bae3bc651		 pdf-font-stream PDF embedded font (sfnt) at offset 0x849A 10820 bytes

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