Malicious PDF — malware analysis report

Static analysis result for SHA-256 c321dc5e6312405d…

MALICIOUS

PDF

45.9 KB Created: 2020-08-24 10:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adcb64e90dea362d6a7e05933ca36896 SHA-1: 5d5ef0e674f9e3286ffa35f4e4b09271663f9372 SHA-256: c321dc5e6312405d45c4f82d9946a5e0009873896e7be1e5bc20ec4d3c33fe6e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=online+programming+learning+platform'. This suggests the document is designed to trick users into visiting malicious sites under the guise of educational content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, limiting the analysis of further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=online+programming+learning+platform
    • http://xedon.alittlebitofhappy.org/uploads/1/3/1/3/131383309/nukezewav.pdf
    • http://files.prezziessugarloaf.com/uploads/1/3/1/4/131438151/e895e0a5.pdf
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/evine_channel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8456/files/apartment_1303_imdb_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/64090605543.pdf
    • https://cdn.shopify.com/s/files/1/0430/2811/9706/files/56923385350.pdf
    • https://cdn.shopify.com/s/files/1/0429/5124/5987/files/android_studio_example_project.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9820/files/cartea_amantele_trecutului.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/barapozominowag.pdf
    • https://cdn.shopify.com/s/files/1/0434/4188/1253/files/22292894171.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8607/files/gumixadidevojozutamis.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/xemasujakunexipulupelov.pdf
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/10172571358.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81579197248.pdf
    • https://cdn.shopify.com/s/files/1/0430/3339/5353/files/navarre_bible_online.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_off000067dc.bin
c8c94526dd3169bffc3d18ae646c2da596c72aa7dfcea54d73e7e4b2a3b58a19
pdf-font-stream PDF embedded font (sfnt) at offset 0x67DC 4856 bytes
font_01_sfnt_off00007846.bin
3f2eaf7d423454c703826b486a949b29dfabd32cc6a08148ba20f3f3791f752c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7846 10676 bytes
font_02_sfnt_off00009c4c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C4C 4324 bytes