Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b58c147f05c815a…

MALICIOUS

PDF

34.7 KB Created: 2020-08-24 11:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd10228913e0ec4dc8da7967e4542fa0 SHA-1: 6cefb8516f40b933ac856dbe2c4738becc419148 SHA-256: 1b58c147f05c815a209a258f3bfb64d03f5f9306bfd49227d6b94593f970f12a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially garbled, includes the text 'How to get footer template in gridview' and the URL that triggered the malicious redirector heuristic. This suggests a lure to a malicious site, likely for phishing or malware distribution. The presence of multiple PDF links, many hosted on Shopify, indicates a potential link farm used to obscure the malicious destination.

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.cc/pify?keyword=how+to+get+footer+template+in+gridview
    • http://tekax.sagehousebathnbody.com/uploads/1/3/1/6/131606778/809a22cb1f.pdf
    • http://files.vomhiddencreek.com/uploads/1/3/1/6/131606127/kukuko.pdf
    • http://files.sanmateolimos.com/uploads/1/3/1/1/131163540/a374f95dc.pdf
    • http://bilepel.gracepressdesign.com/uploads/1/3/1/4/131407227/nowobajem.pdf
    • https://cdn.shopify.com/s/files/1/0464/6354/9592/files/sound_cue_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/xawixamoriz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/christian_bioethics.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3188/files/captains_of_industry_or_robber_barons.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0589/files/kejekulevidave.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0016/files/strength_of_materials_basic_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0440/6863/4789/files/authorizations_in_sap_software_design_and_configuration.pdf
    • https://cdn.shopify.com/s/files/1/0434/2431/7596/files/kumuvasofifakod.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_off00004971.bin
74053804e661329295b95577916e342133c79646d38a1d26dc8ebbdff9f0fdf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4971 5296 bytes
font_01_sfnt_off00005b7d.bin
1fe31044ab364277ff04f439d078705e61d3f3b8136549900f7b942f5c81ed5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7D 10156 bytes