Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca4704c2f1e1d82…

MALICIOUS

PDF

47.9 KB Created: 2020-08-10 22:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56b21c946c44b4381d853cf57e2e43cd SHA-1: 4b1e53f93c05dd5c3c9c443e3c1b0be34f4fc0e3 SHA-256: 4ca4704c2f1e1d820ab661846a9d76d2c9f2e6d7e4676f44bbb2fc91e97547dd
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary URL, https://ttraff.com/pify?keyword=alimentos+que+contienen+vitamina+c+pdf, is likely used to obscure the true malicious destination. The document body itself is heavily obfuscated and contains remnants of this URL, further supporting its role in a redirection scheme.

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=alimentos+que+contienen+vitamina+c+pdf
    • http://files.visiontreecenter.org/uploads/1/3/0/7/130739892/gaxanipi_vabogisozetigo.pdf
    • http://files.coyotemusicstudio.com/uploads/1/3/0/8/130814118/tufiruwerakijij.pdf
    • http://files.fourseasonsbeautysalon.com/uploads/1/3/1/4/131437222/faziwinu-riforoxisalaj-katekobema.pdf
    • http://ziwutoz.velankannisocal.org/uploads/1/3/0/8/130874050/4e68d1.pdf
    • http://files.en.fteacadia.com/uploads/1/3/1/4/131453432/kepux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/timex_expedition_scout_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/traumatic_brain_injury_journal.pdf
    • https://cdn.shopify.com/s/files/1/0449/6615/0303/files/basta_de_historias_andres_oppenheimer.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/10871728013.pdf
    • https://cdn.shopify.com/s/files/1/0435/1796/8543/files/drrr_grade_11.pdf
    • https://cdn.shopify.com/s/files/1/0435/5640/5411/files/43547911951.pdf
    • https://cdn.shopify.com/s/files/1/0438/3657/1808/files/fexutavudezujapuxowu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7002/8966/files/bikobekasadev.pdf
    • https://cdn.shopify.com/s/files/1/0437/0595/8565/files/xobezoda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1641/1547/files/zezubazafanupifojejogadu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/51630232236.pdf
    • https://cdn.shopify.com/s/files/1/0433/3040/4502/files/calculus_by_swokowski_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/4132/3170/files/33425866898.pdf
    • https://cdn.shopify.com/s/files/1/0430/0914/7043/files/raiz_pivotante.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_off000078dd.bin
28a2eb6d67cb20d7c1b899f12e437bdb36dd3b8906692d6a6eff528545c72c21
pdf-font-stream PDF embedded font (sfnt) at offset 0x78DD 5380 bytes
font_01_sfnt_off00008b22.bin
fb999f6743c317b630c28c8209af7898dbf1e2aeac314c019ab0bcfead0a5db4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B22 11300 bytes