Malicious PDF — malware analysis report

Static analysis result for SHA-256 df440ea2e1e2a8c0…

MALICIOUS

PDF

34.5 KB Created: 2020-09-07 23:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9495ab28ba3ee41dd34f1c86e0415ecb SHA-1: dff28f7a446e36b026b8175a75b2b3e4c41b4770 SHA-256: df440ea2e1e2a8c0349c02680cf9e72e0b360257052f70597093a2c50d484bb4
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its structure containing a large number of external links, characteristic of a link farm. One of these links, 'https://ttraff.link/wix?keyword=chogada+tara+dance+video++mp4', is flagged as a malicious redirector. The document body contains garbled text but includes the same search query as the redirector URL, suggesting a lure. The presence of numerous benign-looking PDF links hosted on cdn.shopify.com indicates an attempt to camouflage the malicious redirector within a larger set of links.

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=chogada+tara+dance+video++mp4
    • https://cdn.shopify.com/s/files/1/0432/0352/6820/files/ffxiv_housing_placard_macro.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7755/files/3_letter_usernames.pdf
    • https://cdn.shopify.com/s/files/1/0431/9769/4114/files/college_board_test_3_answer_key.pdf
    • https://static.usrfiles.com/ugd/fac845_bf473c56c616430db8d3eebe68c911f0.pdf
    • https://static.usrfiles.com/ugd/756799_47ddeba818c149c0bc2fa40e1e708206.pdf
    • https://static.usrfiles.com/ugd/a43ec6_16e6534297fc4417921535fd33612110.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_06208727fc1242e8b2dfbbcfa7e48f47.pdf
    • https://static.usrfiles.com/ugd/b8c837_54074f6595154449b2e999a8656ee5d4.pdf
    • https://cdn.shopify.com/s/files/1/0432/7348/6496/files/gymnastic_rings_buying_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1251/files/skyrim_speed_and_stability_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/9816/7713/files/wrong_turn_5_movie_in_tamilyogi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/pifupunolo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1690/files/libro_fundamentos_de_la_administracion_lourdes_munch_y_jose_garcia.pdf
    • https://cdn.shopify.com/s/files/1/0439/0112/4760/files/year_6_maths_worksheets_uk.pdf
    • https://cdn.shopify.com/s/files/1/0461/9780/1111/files/reading_comprehension_worksheets_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0430/6557/3537/files/lefoo_lf10-4h_home_depot.pdf
    • https://cdn.shopify.com/s/files/1/0437/2814/2501/files/centrales_electricas_libros.pdf
    • https://cdn.shopify.com/s/files/1/0433/3800/6686/files/74526507302.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_off00004a70.bin
d9853ec0c2d0184074f4907539b68ddb2c01dce850253cc56b9e5f3f33a913da
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A70 5328 bytes
font_01_sfnt_off00005c71.bin
71b4387bcdf3821739001dac81e03c0fb8ab1451f81b850f383e043a03c76a6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C71 9528 bytes