Malicious PDF — malware analysis report

Static analysis result for SHA-256 0072c92ca9af0248…

MALICIOUS

PDF

36.5 KB Created: 2020-08-18 19:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e70e3e27004d0ce3add3d923e1b4a605 SHA-1: 6d8161167b252ccf068e0411dcf14ae791e0b358 SHA-256: 0072c92ca9af0248dcae924a88689ca9d8dbc4227352a4168646e6b1d15c63dd
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to the redirector's keyword, suggesting a lure. The presence of a link farm further supports the malicious intent of distributing traffic to potentially harmful sites.

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=blockbuster+telugu+song++320kbps
    • http://zanos.meganlewis1illustrator.com/uploads/1/3/0/9/130969060/7128956.pdf
    • http://files.kuwaitikuwait.com/uploads/1/3/1/4/131453068/tibobabozapiki.pdf
    • http://files.advancedanaerobics.com/uploads/1/3/0/9/130969555/davam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7369/2063/files/69964862369.pdf
    • https://cdn.shopify.com/s/files/1/0431/8461/9680/files/88227052670.pdf
    • https://cdn.shopify.com/s/files/1/0431/9019/0248/files/87552975214.pdf
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/15809061589.pdf
    • https://cdn.shopify.com/s/files/1/0435/8507/7405/files/31381427608.pdf
    • https://cdn.shopify.com/s/files/1/0434/5679/0695/files/xupelimefamabulavevarem.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/76559196012.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/90742333387.pdf
    • https://cdn.shopify.com/s/files/1/0435/4310/1591/files/35468605135.pdf
    • https://cdn.shopify.com/s/files/1/0431/2222/9397/files/10531844220.pdf
    • https://cdn.shopify.com/s/files/1/0428/3462/4679/files/62655281139.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f0b.bin
a466ce3a567838d0f0a77cab4f41aafe654bf24a3adcd5094b19ef7dc230df0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F0B 5580 bytes
font_01_sfnt_off00006215.bin
eb49e6a7c6397d0e1c5afb67502ee44de7c1016b900026e35b117adf7f26967e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6215 10304 bytes