Malicious PDF — malware analysis report

Static analysis result for SHA-256 94115ad3709dbe02…

MALICIOUS

PDF

47.2 KB Created: 2020-08-29 19:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10ed4f575873aebd2a08d6f1ecc26fff SHA-1: d089e5c9847b59d6c11f7115ad872448418125f4 SHA-256: 94115ad3709dbe022f2dc0d4cf9435bc8dd2a4c6f0fb62aed9dc4fcffddba1ac
152 Risk Score

Malware Insights

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

The PDF contains a link disguised as a book title, which redirects to a known malicious domain (ttraff.com). This indicates a phishing or social engineering attempt to lure the user to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded link is sufficient evidence of malicious intent.

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=the+book+of+the+duchess+pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/delorinegitelajo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/rinetokipid.pdf
    • https://cdn.shopify.com/s/files/1/0429/2080/4511/files/megabox_hd_can_t_play_video.pdf
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/97404050858.pdf
    • https://cdn.shopify.com/s/files/1/0430/3273/9989/files/fabeveguputemapapefepuk.pdf
    • https://static.usrfiles.com/ugd/6df952_66e0f02da5474d10a3157843e871cd6b.pdf
    • https://static.usrfiles.com/ugd/87a178_7ef8838cf9ff4cdcb758fd978da6993e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d875d13cd1e6451d9ac5728e0dbfcc71.pdf
    • https://static.usrfiles.com/ugd/63d3ad_8a30e3fa1efc4d118938eabdef39f249.pdf
    • https://cdn.shopify.com/s/files/1/0428/7902/5318/files/download_medical_biochemistry_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0436/4081/5774/files/google_docs_template_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/56648494397.pdf
    • https://cdn.shopify.com/s/files/1/0437/6579/2929/files/90990720064.pdf
    • https://cdn.shopify.com/s/files/1/0437/5642/1278/files/arnold_toynbee_civilization_on_trial.pdf
    • https://cdn.shopify.com/s/files/1/0430/4220/9945/files/muropunom.pdf
    • https://cdn.shopify.com/s/files/1/0433/3817/0523/files/human_anatomy_book_bd_chaurasia.pdf
    • https://cdn.shopify.com/s/files/1/0433/6074/7688/files/dududurezizelelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6074/files/dufakoguzobe.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_off00007bdc.bin
67e125f601707245876ea748b62ee4ea5484e5e0f9cda970f5805bbb16f91490		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDC 5060 bytes
font_01_sfnt_off00008d0e.bin
1355d57758638ab1c65e27fd72d9130d9186e59ec21b260bbe20a4f660fd29f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0E 10200 bytes

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