Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35634dd7f8c9599…

MALICIOUS

PDF

32.1 KB Created: 2020-08-18 15:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4cbf5be698125ea59566450a26d41ff SHA-1: 51033a76d52c228cefdf220bbc875561ca5357c9 SHA-256: c35634dd7f8c9599fa5ce417d0e979ef3726866742bc4a95562217ac6668c676
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 a link farm hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=microstrategy+intelligence+server+cluster+configuration+guide', is flagged as a malicious redirector. The document body, though heavily corrupted, appears to contain text related to a 'Microstrategy intelligence server cluster configuration guide', suggesting a lure to trick users into clicking the malicious links.

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.ru/pify?keyword=microstrategy+intelligence+server+cluster+configuration+guide
    • http://sutax.shortattentionspanquilting.com/uploads/1/3/1/4/131406893/e27349dfed3db.pdf
    • http://files.zeezunnur.com/uploads/1/3/0/9/130969371/titunubunaritot-fizuvijoroj-mowapuj-rukorametovuviw.pdf
    • https://cdn.shopify.com/s/files/1/0437/4183/9514/files/jack_pot_songs.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72890356131.pdf
    • https://cdn.shopify.com/s/files/1/0437/6857/8210/files/bachelors_2015_dual_audio_movie.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/lipidaveb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mosagewenusuwaguxizekud.pdf
    • https://cdn.shopify.com/s/files/1/0429/5714/4230/files/pejek.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/jejifafezugufakijewanoma.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7599/files/terosudaniluwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/botonetexikube.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/loi_sur_l_amnagement_du_territoire.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/47711656088.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47878122177.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_off00004253.bin
38952542e9058f336184d7cdcfba26424cc44b495e44866379b1264d0da12cbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4253 5356 bytes
font_01_sfnt_off000054a7.bin
23e57b658bd85221c6f93b83b87cd5ca3bb765fa01f24e8c10e41ceaf778da95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54A7 8916 bytes

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