Malicious PDF — malware analysis report

Static analysis result for SHA-256 f84cc0df93624868…

MALICIOUS

PDF

42.0 KB Created: 2020-08-21 10:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bf0122dd53b914b295e38b90d064f0f SHA-1: 103f8f32106544289bad86ddf54d2a2c11a915d4 SHA-256: f84cc0df936248681feec509cf21d49cf2f1e500133a658cd60daa1a082d0ad5
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=celulas+falciformes+tratamiento'. The document body, though heavily obfuscated, contains fragments of this URL and also references to 'celulas falciformes tratamiento' (sickle cell treatment), suggesting a lure. Additionally, a heuristic for a PDF link farm was triggered, with multiple links to Shopify domains, one of which is 'https://cdn.shopify.com/s/files/1/0433/2358/8773/files/lawolilokofepimanel.pdf'. The primary intent appears to be redirecting the user to malicious infrastructure.

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=celulas+falciformes+tratamiento
    • http://files.sirbonifurnishings.com/uploads/1/3/0/8/130814340/gikiwigaluxu_nelixaxirum.pdf
    • http://files.wakunpagoldenretrievers.com/uploads/1/3/1/4/131406473/6207058.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/lawolilokofepimanel.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/simone_de_beauvoir_a_convidada.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9173/files/64321174995.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/hp_25es_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/6457/2569/files/alkuu_kitap_indir.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/bixavelobumugageteb.pdf
    • https://cdn.shopify.com/s/files/1/0429/2889/8211/files/3ds_ftp_server.pdf
    • https://cdn.shopify.com/s/files/1/0432/6244/3675/files/risk_1959_rules.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3074/files/asexual_reproduction_in_animals_and_plants.pdf
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/cell_structure_and_function_ncert.pdf
    • https://cdn.shopify.com/s/files/1/0434/1094/8254/files/about_me_essay_format.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_off0000650f.bin
3904ba8e9e74bd02b016d2dac4b3a1287d8beb926b78fc587a92b1f5e7aae163		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650F 4932 bytes
font_01_sfnt_off000075b3.bin
a58514a0c31e3320ef2ccf60a423e961d4b0fca81660fdedf01df8881f77584e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B3 11384 bytes

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