Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1f86d05396dd77…

MALICIOUS

PDF

64.9 KB Created: 2020-09-02 03:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2815b81b9a8781f5465ea5dc6752252 SHA-1: bde8e2dd3abda97f629be3db1f15aac94d17b22f SHA-256: de1f86d05396dd777c4f09d827f90b5dbe0b4c4dd21e663730199e45f63dd752
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious intent. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=bollywood+8d+music+songs
    • https://cdn.shopify.com/s/files/1/0431/5332/6242/files/18133114795.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/barcos_que_vuelan_descargar_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/9171/3443/files/profit_and_loss_account_format_example.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/a_preference_decision_in_capital_bud.pdf
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/barron_s_anatomy_flash_cards.pdf
    • https://cdn.shopify.com/s/files/1/0431/8216/2084/files/sparge_parole_wifi_cu_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/xonevobovavakev.pdf
    • https://cdn.shopify.com/s/files/1/0441/3915/1512/files/96015274413.pdf
    • https://static.usrfiles.com/ugd/76dd3d_32e6935fcbe746bf85d40fe2025dadc3.pdf
    • https://static.usrfiles.com/ugd/b8c837_6326ac2fa1aa495d98133b0e4ba15e97.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_f721aa6745c24e6492722d46f1e03b42.pdf
    • https://static.usrfiles.com/ugd/5438e3_b56fcd09958245ffbbf0bc20a0df6c32.pdf
    • https://static.usrfiles.com/ugd/405339_f5b97c3b636f45c5922b6c174d232863.pdf
    • https://static.usrfiles.com/ugd/868b90_e36e1afec6a648899bfd482d41f98585.pdf
    • https://static.usrfiles.com/ugd/8de238_c725cc0288b84479abf4ca7b538cd806.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_off0000b768.bin
152581b1edd8b570457cff83df2b31a7caa310c6dcd468cfe8ead420c753a4a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xB768 5388 bytes
font_01_sfnt_off0000c9d3.bin
fd115f244c3f4782c35d216411dcd1cbc3f571f3a471e8697cc888bbda1ad790
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D3 14392 bytes