Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4028e6981a1f760…

MALICIOUS

PDF

39.3 KB Created: 2020-08-24 21:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6fdd5bc9fb11568fd4fa817d7e8643d SHA-1: 80a7b907b1143dcfe9f150267211bde5085e2157 SHA-256: e4028e6981a1f76002eb435bce3e7c6b8a4e553d22d572d9323e592ebf740d42
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link at 'https://ttraff.cc/pify?keyword=android+apps+whirlpool+forums' points to known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests a large number of external PDF links were generated, likely for SEO manipulation or to host further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=android+apps+whirlpool+forums
    • http://files.newyorkthespians.org/uploads/1/3/1/0/131070173/7cbe873e71d.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/46955211252.pdf
    • https://cdn.shopify.com/s/files/1/0431/6987/4080/files/95445446263.pdf
    • https://cdn.shopify.com/s/files/1/0461/8341/5971/files/repijijoxinitojo.pdf
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/briggs_and_stratton_model_135202_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0669/7367/files/dufedemezujunodakitodal.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/bible_prayer_study_course_kenneth_hagin.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/1634207182.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/example_storing_strings_in_eeprom.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/22524985153.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/74840347430.pdf
    • https://cdn.shopify.com/s/files/1/0436/4750/0448/files/72713989322.pdf
    • https://cdn.shopify.com/s/files/1/0434/2946/2165/files/is_there_a_color_code_for_transparent.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/aide_memoire_electronique.pdf
    • https://cdn.shopify.com/s/files/1/0437/7133/0709/files/tofaxerop.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_off00005c59.bin
a5fab9b0205183ea1f58f5c6c37621bee92885e6c035835c564b207980fbcb48
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C59 5364 bytes
font_01_sfnt_off00006e73.bin
cd486145adaaebfc35eb45b5aef30626a5ac0ef89b206e0069c24624ba754a9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E73 9984 bytes