Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d58cd23c95d9bf…

MALICIOUS

PDF

34.8 KB Created: 2020-08-08 03:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce666d8d916a07a75252a1d4c895bb64 SHA-1: 56e4241fa53761199daf015f4512abdd4846bcc0 SHA-256: e4d58cd23c95d9bf49fe91696b39686cfd73367b9d96d77c0ba53e54d502413a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to a 'Telugu calendar 2020 pdf october'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate a malicious intent to redirect users to harmful content. The ML classifier also flagged this PDF with high confidence.

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.cc/pify?keyword=telugu+calendar+2020+pdf+october
    • http://files.jkacampsie.com.au/uploads/1/3/2/8/132815828/6607959.pdf
    • http://files.magicbrushpottery.com/uploads/1/3/0/8/130874324/feroxaxitatimi-bavodaxuda-zigego-jotenijekeb.pdf
    • http://xetiviwev.blackbutterflystudio.com/uploads/1/3/0/7/130740141/9643214.pdf
    • https://cdn.shopify.com/s/files/1/0439/6810/2558/files/guxaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/75153175157.pdf
    • https://cdn.shopify.com/s/files/1/0436/1663/2992/files/sadopo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1729/0407/files/xuwutirogifuza.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6661/files/wemebefowasetida.pdf
    • https://cdn.shopify.com/s/files/1/0439/3595/7147/files/annotating_ipad_pro.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9054/files/zagizogibapamok.pdf
    • https://cdn.shopify.com/s/files/1/0433/5645/5067/files/gifezosiv.pdf
    • https://cdn.shopify.com/s/files/1/0438/4188/0224/files/hallelujah_guitar_sheet_music_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_off00004bba.bin
5bb3a93773b74801f34c921e6f37fb5afde0fa1d16e05eeacd0b67a808a893c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BBA 5508 bytes
font_01_sfnt_off00005e7c.bin
3fb31e46c7946ac4381f532a01f8d073b52bd452340063aa06def89ee74173ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7C 9392 bytes