Malicious PDF — malware analysis report

Static analysis result for SHA-256 b321ff0ecafff0dc…

MALICIOUS

PDF

42.6 KB Created: 2020-09-23 20:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf93b8af6f1a88e10068e6041ea579c6 SHA-1: 76a9ac02d4b9992d8cf1468171377b9ab34abaa8 SHA-256: b321ff0ecafff0dcaa2aa6a4257efa75322511c7c8d6b171f3f1bcbede613f26
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URLs, particularly the one leading to 'ttraff.me', are indicative of a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the sheer volume of external links suggests a broad-based lure.

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.me/wix?keyword=go+faarr+answers
    • http://files.theinnatraggededge.com/uploads/1/3/0/8/130874240/12c58bf09.pdf
    • http://sakupux.dptherapyfirst.com/uploads/1/3/1/4/131409236/pamudonuner.pdf
    • http://files.avalancheenduranceevents.com/uploads/1/3/1/3/131380005/fudov.pdf
    • http://files.tamsinlynes.co.uk/uploads/1/3/1/4/131406049/zerapokazat-kirobadaduv.pdf
    • https://cdn.shopify.com/s/files/1/0434/6544/1445/files/jutivafugegujepumuneto.pdf
    • https://cdn.shopify.com/s/files/1/0479/5223/2615/files/93023431602.pdf
    • https://cdn.shopify.com/s/files/1/0483/8178/8320/files/concave_and_convex_mirror_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9310/files/alexander_s_ragtime_band_piano.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/gojip.pdf
    • https://176d3c09-9126-432c-9cbf-c97957b2d577.filesusr.com/ugd/0a51c1_862f0f7ce0c74dd2a0be7d60641fb307.pdf?index=true
    • https://2bc12287-9883-40a6-a3e3-e8f99a881b7d.filesusr.com/ugd/66c878_e0613d0bde574dc68390484088173457.pdf?index=true
    • https://274996d5-3a39-4238-aefe-d8e9f5ee64b5.filesusr.com/ugd/ec0012_0e101247f0ea43868de0db49d4592e2d.pdf?index=true
    • https://bf69bbfd-82da-4915-9a8e-c36cdff5abce.filesusr.com/ugd/269bb8_2d5a30239c434e179235dfca0db9bdbc.pdf?index=true
    • https://0ff40511-03b7-46b4-94aa-21c3568a59cb.filesusr.com/ugd/a91264_4c9b2057f6174f0fac2d4b511fbd445c.pdf?index=true
    • https://353922fb-2f54-42dc-8335-4d9de7f5b52c.filesusr.com/ugd/868b90_279ce2f1d07e42aca83b062f87dca0e8.pdf?index=true
    • https://8b44ad67-602d-4850-ab06-4f3de37f60e9.filesusr.com/ugd/3c9ac1_81b6bac3a2d84c42b97f0d130baa318c.pdf?index=true
    • 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_off0000686b.bin
ae5543731b6681a16f9b6ad886b4950d82aedf9aea10dbf9a5536bb7d34434ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x686B 4852 bytes
font_01_sfnt_off0000790e.bin
6b14b0306c25fe0cd763d77e5914a9215be0d0f63f46748fbc2d5f298d61d0c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x790E 10728 bytes