Malicious PDF — malware analysis report

Static analysis result for SHA-256 c85d711abc4fe753…

MALICIOUS

PDF

46.3 KB Created: 2020-07-31 16:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c3f3241b0ba7ecfbfa7d353bd58b4ea SHA-1: 18dfc359acfaac8d170dd9cf1b7f67b3d84e107a SHA-256: c85d711abc4fe753344ee2bab9f9457eca92c04cf75b23352770a07976040fe1
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting an SEO manipulation or phishing attempt. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=superscript+in+markdown'. While no scripts were extracted, the sheer volume of links and the critical heuristic firings strongly indicate malicious intent.

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=superscript+in+markdown
    • http://files.lisawbwalker.com/uploads/1/3/1/3/131383358/vizagewogobowed.pdf
    • http://files.marchantdart.com/uploads/1/3/1/1/131163540/bajude-diwopozusinojo-dugewa.pdf
    • http://files.thehuskyhowler.com/uploads/1/3/0/7/130740183/leruxojora.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/26252356119.pdf
    • https://cdn.shopify.com/s/files/1/0429/0795/9452/files/lorofiro.pdf
    • https://cdn.shopify.com/s/files/1/0439/8442/1022/files/tegidumunolixibaxuganawuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/nifolagamomigurizeliv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/zifapofusutoxidozodonekun.pdf
    • https://cdn.shopify.com/s/files/1/0434/4666/5382/files/16762458554.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/fixolabelejuvubaviwivan.pdf
    • https://cdn.shopify.com/s/files/1/0432/3924/3943/files/38993982512.pdf
    • https://cdn.shopify.com/s/files/1/0428/4363/5879/files/tijulepisaneluzej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41557636134.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c4e.bin
5dd96cdecf7789e1900799a0d1bb62fde9463e7f9db1ce269ca5f00375666bee
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4E 5444 bytes
font_01_sfnt_off00006ecd.bin
ce00f0ffb999fbb31dc5c2ef02f9ba5475979fb0264a7845c88b6aa0e50a2d96
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECD 11692 bytes
font_02_sfnt_off000096e2.bin
cb0239a5e77cb37740da0b4997a5f47117ed526887f952b298c44ef8b2f17e18
pdf-font-stream PDF embedded font (sfnt) at offset 0x96E2 16232 bytes