Malicious PDF — malware analysis report

Static analysis result for SHA-256 eadd6657ce7019d4…

MALICIOUS

PDF

46.0 KB Created: 2020-07-23 15:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f51d16bbfa391d455db844ab4fb54bab SHA-1: 4bf4ff707c6afab28050e2aa71d97e9627e81197 SHA-256: eadd6657ce7019d4cc51658f11a3f26797fbf98a6e3e40bcc9aac51944662488
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also contains a PDF link farm heuristic, indicating a large number of external links. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'El libro rojo del anarquismo pdf', which is likely intended to trick users into clicking the malicious link.

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=el+libro+rojo+del+anarquismo+pdf
    • http://files.sheilatrecartin.com/uploads/1/3/0/9/130969169/5206781.pdf
    • http://files.laneryohirabayashi.com/uploads/1/3/1/4/131409442/8e35c3450c.pdf
    • http://files.steeringcomp.com/uploads/1/3/0/7/130776393/1598890.pdf
    • https://cdn.shopify.com/s/files/1/0430/0685/3269/files/bafokekubu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3857/files/kaporaramujusezed.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8342/files/55309842973.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/86498256538.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20597849085.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/minokavasojoruloje.pdf
    • https://cdn.shopify.com/s/files/1/0430/9277/0977/files/26208624280.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/sodedopajirosilu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/fupimefelu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/88759358446.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/44316136428.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/80215288337.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/gugipajipagamu.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_off0000726a.bin
92bc848c42af7cfa72bd114321de56cfe4c27ca14de21da6c7f8ea6b5601513d
pdf-font-stream PDF embedded font (sfnt) at offset 0x726A 5288 bytes
font_01_sfnt_off0000843b.bin
093b3305c470d8222e201e80467d45a3ff98e93febe458701906e480ad0b52ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x843B 11300 bytes