Malicious PDF — malware analysis report

Static analysis result for SHA-256 f32fdb14c3ef08c3…

MALICIOUS

PDF

46.7 KB Created: 2020-09-03 07:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c72eb1983ec3f6850ebe2b57690c27c2 SHA-1: f435b9fbcbb62e6fafc7fd2571eac907a6f8bcc7 SHA-256: f32fdb14c3ef08c36028c9951f9514854c66ef8575f86acb3d1106cf0540162f
152 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 presence of a large link farm suggests an attempt to manipulate search engine results or distribute malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.club/wix?keyword=elephant+polo+listening+answers
    • https://cdn.shopify.com/s/files/1/0431/5529/2317/files/cariloha_bamboo_sheets_queen.pdf
    • https://cdn.shopify.com/s/files/1/0436/1460/1378/files/61735280405.pdf
    • https://cdn.shopify.com/s/files/1/0437/2119/5669/files/68471083142.pdf
    • https://cdn.shopify.com/s/files/1/0447/7534/2246/files/30951250995.pdf
    • https://cdn.shopify.com/s/files/1/0428/8705/3471/files/canon_c5250_driver.pdf
    • https://cdn.shopify.com/s/files/1/0440/1581/2766/files/pemis.pdf
    • https://cdn.shopify.com/s/files/1/0437/8443/7922/files/wondershare_filmora_8_full_version_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/34206614177.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/2445594745.pdf
    • https://cdn.shopify.com/s/files/1/0428/5965/9420/files/mozoraxupivevepa.pdf
    • https://cdn.shopify.com/s/files/1/0440/8157/8136/files/app_store_slow_ios_12.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69262577592.pdf
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/cute_baby_girl_pics_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/6187/9719/files/ordem_hemiptera.pdf
    • https://cdn.shopify.com/s/files/1/0469/0522/9474/files/25031950871.pdf
    • https://cdn.shopify.com/s/files/1/0434/1491/3191/files/68656564923.pdf
    • https://cdn.shopify.com/s/files/1/0434/8474/1798/files/10395586424.pdf
    • https://cdn.shopify.com/s/files/1/0437/3151/7592/files/anne_marie_rockabye_mp4_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/7701/6483/files/49512902115.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/cissp_book_free.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_off000079e2.bin
5ed1a1f1e3eb60e7c022c087e79adf24f6853b616d0a7bec693e0e3800b3f3bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E2 5132 bytes
font_01_sfnt_off00008b61.bin
c635055b7a6be0fb7b6eae534911a8b420dfdcc4be6cb1d27ba6f8d1913b9507		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B61 9892 bytes

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