Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de5362d169999b8…

MALICIOUS

PDF

40.6 KB Created: 2020-08-08 04:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b713ea0156b096ff60bdf56217f49c4 SHA-1: fd9987ef1515a778a128283df1fd16c7eb7fd2cf SHA-256: 8de5362d169999b8c67bf28a82e85e5bf9b621b5696c4dea623048974412dd07
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure, specifically 'ttraff.com', which is presented with a search query for 'alphabetical reasoning pdf download'. This suggests a social engineering tactic to trick users into clicking malicious links. No scripts were extracted from this sample, limiting the analysis of its direct execution behavior.

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=alphabetical+reasoning+pdf+download
    • http://files.marchtomars.com/uploads/1/3/0/8/130813409/lenar_fewavibumat_gafojizivas.pdf
    • http://biloji.suvituominen.com/uploads/1/3/0/7/130776407/nonukil_vuregamopom.pdf
    • http://files.soultrainchoir.com/uploads/1/3/0/7/130776656/4837201.pdf
    • http://mivegapaj.rjevanswriting.com/uploads/1/3/1/4/131407406/e056d7e35f3.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/catecismo_de_la_iglesia_catolica.pdf
    • https://cdn.shopify.com/s/files/1/0438/3319/6706/files/verizon_fios_tv_plans.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/tafupefu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9073/0398/files/96176249969.pdf
    • https://cdn.shopify.com/s/files/1/0434/7861/4168/files/mivukeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/6888/2072/files/1117943140.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4044/files/4999132140.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/xajowuwomawojatutitezola.pdf
    • https://cdn.shopify.com/s/files/1/0437/9348/1889/files/intel_r_i211_gigabit_network_connection.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/raguzamodisosafojuda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0441/9478/files/balance_de_comprobacion_peru.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_off00005e7d.bin
2705b02ac1e3f29b11398f458295869df0580622237879597b868bd094ee2276		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7D 5640 bytes
font_01_sfnt_off000071ab.bin
23b90d2b2ee09bdf5987f67c686cd99992962ac750f91556035c5ffa002ac297		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AB 10532 bytes

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