Malicious PDF — malware analysis report

Static analysis result for SHA-256 0634ca0597c004e2…

MALICIOUS

PDF

49.2 KB Created: 2020-08-10 08:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d052c290a3301ea6fc9c4b11e4765d8 SHA-1: 8e692363f395887391c9ba7454b03df01c9fce38 SHA-256: 0634ca0597c004e2cc8b3098c87c909bf94290cd9adbedd42faa8ed1deb6af24
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, masquerading as reference books, designed to redirect users to malicious infrastructure. The primary malicious URL identified is ttraff.com, which is flagged as a known redirector. The document body itself is heavily obfuscated but contains the malicious URL, indicating a phishing or scam attempt.

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=ca+inter+reference+books+pdf
    • http://kalopobe.ponyenzo.com/uploads/1/3/0/9/130969723/xarufafabugolote.pdf
    • http://files.southerntierstarlites.com/uploads/1/3/2/6/132695278/278c141e7b8.pdf
    • http://files.defriesgardens.com/uploads/1/3/2/6/132696351/70296.pdf
    • http://files.bucksnortnrunclay.com/uploads/1/3/1/4/131453990/sutupip.pdf
    • http://files.markeatongardencentre.com/uploads/1/3/0/7/130739253/vetipipadox-vixitabutiro-nukosin-tekekunekiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/3220/4696/files/98289421122.pdf
    • https://cdn.shopify.com/s/files/1/0429/5720/9766/files/linksys_e1200_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/vadibotosevu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4974/files/mazebasofenu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/jaguwumozamini.pdf
    • https://cdn.shopify.com/s/files/1/0429/1257/9747/files/31857292693.pdf
    • https://cdn.shopify.com/s/files/1/0440/8927/8616/files/derive_joint_cdf_from_joint.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0432/0700/0219/files/fafanebefafipebevetaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6803/files/microelectronic_circuits_and_devices_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/44916610486.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_off000082a3.bin
689c8fc9776b222eafa9f43552951e671204b559946162bd346d7b18deb936ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x82A3 5228 bytes
font_01_sfnt_off00009475.bin
f6896d69241f4481542792a63c39e3444836e4426ae9e60638e15d6c5ab3cf2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9475 10480 bytes