Malicious PDF — malware analysis report

Static analysis result for SHA-256 0461ab840b0fe49d…

MALICIOUS

PDF

43.1 KB Created: 2020-08-21 10:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8bbbec679014d95aa170eb8bf107dfc SHA-1: bbbaa9932789f6417f0e3acc5f2cdeaa25921a67 SHA-256: 0461ab840b0fe49d11de1d2b57e28f034cbfe91ac2b79d3694578dafbca5ac26
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious payload. The presence of a 'download button' lure and a large number of external PDF links further supports a malicious intent, possibly for SEO spam or to distribute further malware. No scripts were extracted, but the PDF structure and embedded links indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=grass+brush+photoshop+free
    • http://dumixarok.lindsaybeattie.com/uploads/1/3/2/3/132303245/lererivezabizani.pdf
    • http://bapoxitu.rihanj.org/uploads/1/3/0/8/130873715/3147075.pdf
    • http://files.stpaulheringtonkansas.com/uploads/1/3/0/7/130775982/deniresaxaku.pdf
    • http://dupojir.jmossart.com/uploads/1/3/2/8/132814930/dusumuzotataj_jebevide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/pdf_biology_class_12_notes.pdf
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/jujenanitisomoridifasa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2739/7797/files/il_cattivo_tedesco_e_il_bravo_italiano_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0999/0043/files/sites_like_kissanime.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/50165398145.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/99009526033.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/91347652933.pdf
    • https://cdn.shopify.com/s/files/1/0433/7362/5500/files/miwunex.pdf
    • https://cdn.shopify.com/s/files/1/0434/7346/9597/files/4573825423.pdf
    • https://cdn.shopify.com/s/files/1/0430/5479/2866/files/legowojo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8060/6111/files/50287800235.pdf
    • https://cdn.shopify.com/s/files/1/0437/4803/2666/files/zisasefosop.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_off000061ec.bin
fbbcfa9b810a5e0dbb7220fd22fd48705e29368e71f15ecf8785e4716d6dae09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61EC 5128 bytes
font_01_sfnt_off00007356.bin
80e042a2a56a781c93edf428201c5f2ed2e213de9f45f8eda74cf603801bf4c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7356 14160 bytes

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