Malicious PDF — malware analysis report

Static analysis result for SHA-256 a552def0525e4988…

MALICIOUS

PDF

37.0 KB Created: 2020-09-05 22:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7449e8c14ce812ef1264fd19204173a SHA-1: 735ca1347ab61c34b00b05b81aeefaf0f39308a2 SHA-256: a552def0525e49882c10a35403a61ca776fcbd2b55a02357276d4aebedec89bf
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 to external PDFs, a technique often used for SEO poisoning or to distribute malicious content. One of these links, 'https://ttraff.link/wix?keyword=a+temperament+theory+of+personality+development+pdf', is flagged as pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the same malicious URL and several benign-looking Shopify URLs.

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.link/wix?keyword=a+temperament+theory+of+personality+development+pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/wedding_escort_cards_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3967/7861/files/39074950528.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/tosibewudegokalo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7674/files/62671635842.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78649322563.pdf
    • https://cdn.shopify.com/s/files/1/0428/6231/3631/files/giralimigorijo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4000/6559/files/ronalivitatu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2439/7989/files/18810614199.pdf
    • https://cdn.shopify.com/s/files/1/0428/8203/9964/files/westworld_theme_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/38366132111.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/new_movies_hd_telugu_2018.pdf
    • https://cdn.shopify.com/s/files/1/0438/8074/3080/files/4733840707.pdf
    • https://cdn.shopify.com/s/files/1/0464/9487/5800/files/anand_shinde_ambedkar_song.pdf
    • https://cdn.shopify.com/s/files/1/0429/0324/0871/files/magnesium_glycinate_powder_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/4870/4920/files/foxabenotajenezaruvig.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/12257660800.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_off000044c3.bin
48b700400080af1376d5747aa04a63d3f2b1f47b94bcab734736e5e3819d02c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x44C3 5220 bytes
font_01_sfnt_off00005656.bin
9a401f3b0d69d1142d1b3217bf15dc3441f5fd5cbfce4bd0271ee15150bc1508
pdf-font-stream PDF embedded font (sfnt) at offset 0x5656 10064 bytes
font_02_sfnt_off000078bf.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x78BF 4324 bytes