Malicious PDF — malware analysis report

Static analysis result for SHA-256 2787a14452d5f21c…

MALICIOUS

PDF

55.7 KB Created: 2020-08-30 06:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c601192d322e77dca4b62ca54fb387d4 SHA-1: 3f1e93495d3fd34e09d50598317045c8ee4242d2 SHA-256: 2787a14452d5f21c8129b80eb8a846213d65e7b5a6d36f049dca85bae37bc6d7
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The primary malicious URL identified is https://ttraff.com/wix?keyword=le+salaire+du+sniper+texte+int%25C3%25A9, which is likely used to direct users to a compromised or malicious website.

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=le+salaire+du+sniper+texte+int%25C3%25A9
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/29646566185.pdf
    • https://cdn.shopify.com/s/files/1/0431/6751/4788/files/75584527156.pdf
    • https://cdn.shopify.com/s/files/1/0428/9963/6390/files/35058354504.pdf
    • https://cdn.shopify.com/s/files/1/0448/5467/3569/files/python_3._7_3_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5082/files/peluzovolanekezasopite.pdf
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/tibazimigosesedu.pdf
    • https://cdn.shopify.com/s/files/1/0438/6252/4069/files/bullet_force_apk_android.pdf
    • https://cdn.shopify.com/s/files/1/0436/6611/2662/files/blood_brain_barrier_anatomy_and_physiology.pdf
    • https://cdn.shopify.com/s/files/1/0461/9773/5575/files/abdominal_aortic_aneurysm_guidelines_esvs.pdf
    • https://cdn.shopify.com/s/files/1/0435/3743/2744/files/kannada_opposite_words_list_in.pdf
    • https://cdn.shopify.com/s/files/1/0431/1003/9719/files/5937565709.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/telerik_kendo_mvc_grid_column_template.pdf
    • https://cdn.shopify.com/s/files/1/0446/6681/4617/files/manejo_de_absceso_periamigdalino.pdf
    • https://cdn.shopify.com/s/files/1/0431/0532/1109/files/girasexazonivibo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1280/0159/files/apprendre__crire_l_arabe.pdf
    • https://static.usrfiles.com/ugd/b8c837_7965b7021d734b74bcf01906dc02aa5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3a54f9e10504ccda4b2910aa5eba357.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_off00009611.bin
84df99fa1b8ec0d0cbc1d430bb0a8be4b037dd0dd7232af71447d54b1339c30e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9611 5104 bytes
font_01_sfnt_off0000a734.bin
4975bc04d9068cd55f13aea2b04df84102b4a8a0ab8895d89ea01b623ccd2dff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA734 13500 bytes

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