Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d206f5449fde394…

MALICIOUS

PDF

38.4 KB Created: 2020-08-14 09:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 385c8026516ebc01289cff3d9d35191e SHA-1: 144ebeaeefee5f43ba9135ebb1f5d2939c10f2b6 SHA-256: 2d206f5449fde394599748b6600783412e6e2b0e5054598a9be81d79c2acf9e2
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, contains text related to a worksheet and also includes the malicious URL. The presence of numerous external links suggests a link farm or redirection strategy to distribute malicious content.

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=pangngalang+pantangi+worksheet+for+grade+5
    • http://nusum.valkyrieglass.com/uploads/1/3/1/3/131383613/wipunidebewi_vajivuvumixip_wobilu.pdf
    • http://files.reneytours.com/uploads/1/3/2/7/132740457/0eb9a28d.pdf
    • http://files.brandnewdaywellness.com/uploads/1/3/0/7/130739284/1926600.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/cardiac_rehabilitation_aha.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/61025146240.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/catalytic_hydrogenation_in_organic_syntheses.pdf
    • https://cdn.shopify.com/s/files/1/0432/5464/4894/files/27944006426.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/puvapilediwusejaken.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0941/files/tedov.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2771/files/revised_common_lectionary_year_c.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kaxoku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wupukibasabozuxijixosi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/83002494172.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/gould_s_pathophysiology_for_the_health_professions_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/1063/7475/files/85247384990.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_off00005782.bin
c7a4ea25b8d77fc5ae77d27945fe24e9c9a34b406fd81c607f4f3f570d344acf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5782 5584 bytes
font_01_sfnt_off00006a8c.bin
e65775e508ea0eddf1ef5f1690067d00fe4ae992ea974b354e8966f71da1cee2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8C 9908 bytes