Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c6f4fca3aefa02a…

MALICIOUS

PDF

46.8 KB Created: 2020-09-01 22:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e192a24c712bd48d5c443a504dd8324 SHA-1: 8a6a22087a26093d89f7c75184d049b07058e6a9 SHA-256: 1c6f4fca3aefa02a84cc8f95718b4124005a7e5f8e8b280d06292bec6ce914c3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends

The PDF was flagged as malicious due to a critical heuristic identifying a link to known malicious redirector infrastructure. The document body contains the URL 'https://ttraff.com/pify?keyword=bhajan+song++punjabi', which is likely intended to redirect users to a malicious site. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=bhajan+song++punjabi
    • https://static.usrfiles.com/ugd/b8c837_0d8fbc47cf994df08f2ab03af395cb97.pdf
    • https://static.usrfiles.com/ugd/b98abb_17e6c6d9d56049ecaca8e04a299b4d3a.pdf
    • https://static.usrfiles.com/ugd/b7ab08_9708d46681ca43aeb7356d24a1137677.pdf
    • https://static.usrfiles.com/ugd/b8c837_73f291fefe554f6cb4345bd5383cd736.pdf
    • https://static.usrfiles.com/ugd/868401_1b514bb1987e438395039a33784aa4d6.pdf
    • https://static.usrfiles.com/ugd/d63aaf_05a690905cce4ef296505f2cdcd1bd32.pdf
    • https://static.usrfiles.com/ugd/32acb1_735130e4435644e083efe3bfd1156bff.pdf
    • https://static.usrfiles.com/ugd/61b8bf_d5d420a6ae8548e2a4edb5cafa98376e.pdf
    • https://cdn.shopify.com/s/files/1/0436/5425/0654/files/mere_bhole_hai_bhandari_ringtone_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/93075334450.pdf
    • https://cdn.shopify.com/s/files/1/0437/9443/2161/files/pre_calculus_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/0438/7750/files/mitegowomelelasebe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/91844495207.pdf
    • https://static.usrfiles.com/ugd/b8c837_945b6f7220ff415db9fb288c663fedef.pdf
    • https://static.usrfiles.com/ugd/f84671_af81c539659f4542a13a7b1e1599d537.pdf
    • https://static.usrfiles.com/ugd/30e015_2b2303b5822d4f5da8eda99b061d47d1.pdf
    • https://static.usrfiles.com/ugd/b6edda_41a5e3dee20844a5a9ca19795a8d36bb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bac.bin
eb293e2ed8dd19be679b60356612b942c376ab4a317bd4ca19c5c7fbec06dc8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAC 4904 bytes
font_01_sfnt_off00007c48.bin
c3f978116773c4025f9d2c65b54c3f46a18f9224415c25b0eb8396813e6d106c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C48 10600 bytes
font_02_sfnt_off0000a061.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA061 4324 bytes

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