Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde256f4562562a3…

MALICIOUS

PDF

44.5 KB Created: 2020-08-13 23:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5312fcd497ad56436f73304ae57b7b8 SHA-1: f6da2e2fce2cc8f80cdfd6c4b21d4f3ce114fab3 SHA-256: cde256f4562562a3c0adec84d5d80610baf0244aa26df241e03ca1952ec30f41
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body itself contains text that appears to be SEO-optimized content, further supporting the idea that the links are intended to drive traffic to malicious sites.

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.cc/pify?keyword=chakravyuha+songs++free+2016
    • http://files.healthylivingtc.com/uploads/1/3/1/3/131381544/kidaguxunasufonune.pdf
    • http://files.maddiebooks.com/uploads/1/3/2/6/132682792/zesatawuvemu_zofabaxalogezaj_mavujenatijit.pdf
    • http://xiwawuzi.boostsportsconsulting.com/uploads/1/3/1/3/131380429/nexabu-wotegu.pdf
    • http://files.bhsclassof78.com/uploads/1/3/2/3/132303351/pobemekofutefel.pdf
    • http://datadebel.intucoaching.com/uploads/1/3/1/4/131453574/862fb52db.pdf
    • https://cdn.shopify.com/s/files/1/0429/5570/2425/files/muratozofoxudenatularilex.pdf
    • https://cdn.shopify.com/s/files/1/0448/4897/1938/files/easy_beginner_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0440/1224/1046/files/bejulanadowidaxeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0471/files/87113879237.pdf
    • https://cdn.shopify.com/s/files/1/0445/6477/5076/files/general_aptitude_test_questions_and_answers_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0436/9671/7977/files/80982495026.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1642/files/high_voltage_breakdown_tester.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1146/files/14514557019.pdf
    • https://cdn.shopify.com/s/files/1/0431/9746/4731/files/jeliworib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/majusotogozarow.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/96200399818.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/gupodatasizozelibesagodag.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f9b.bin
1d1791df3b2f62ae86aaadcda7804ca0c3f958d7a7998aa8153ca6dea5a0932a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F9B 5608 bytes
font_01_sfnt_off000062c2.bin
6e5de5c6bcb7fdd8c5ca0d25823a8f80e6c764803c1b732dbc9c425a5c0f8ea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C2 2092 bytes
font_02_sfnt_off00006c68.bin
2a2664c283829f8741b134a66cafdae7e2d59ad9bba7fb48bccd4e3edf5d96d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C68 10200 bytes
font_03_sfnt_off00008f94.bin
0b36605a6e61a74a7f8c2aef65bffbce38398019a9a977160a4dcabe0d880f8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F94 16076 bytes

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