Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a88ec3cdb0e0e3…

MALICIOUS

PDF

43.8 KB Created: 2020-08-27 16:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 272c4888e8924f21d6fa95ab6b46bb65 SHA-1: b9f911adfcb491ff9f665602f55a62714bd524e1 SHA-256: 30a88ec3cdb0e0e30c28c6c4eb5e5f627618c7fb478d30d9dc2b4f7a81a86058
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a large number of external links, many of which point to potentially malicious redirectors or SEO link farms. The primary malicious link identified is 'https://ttraff.link/pify?keyword=english+alphabet+images', which likely serves as a redirector to further malicious content. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on various domains, suggesting a link-farming or redirection attack.

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.link/pify?keyword=english+alphabet+images
    • http://files.grumpymanifestationqueen.com/uploads/1/3/2/7/132741385/3421400.pdf
    • http://files.defriesgardens.com/uploads/1/3/0/7/130738806/lugexebavaxi.pdf
    • http://files.fourarrows-ranch.com/uploads/1/3/2/6/132681556/xudejelewofili-xikevipujalox-gizikuvaguke.pdf
    • https://cdn.shopify.com/s/files/1/0437/1592/0024/files/soundcloud_for_macbook_pro.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/81959281746.pdf
    • https://cdn.shopify.com/s/files/1/0432/1312/7835/files/nopivinoridatezumo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6970/2305/files/vijesufuridotutebem.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/zuluzadiratobevedovabata.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/caesar_cipher_wheel.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/85881413483.pdf
    • https://cdn.shopify.com/s/files/1/0431/1587/2423/files/menexupa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8779/7160/files/22172796780.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/zinumosipanodow.pdf
    • https://cdn.shopify.com/s/files/1/0436/0794/9475/files/adjetivos_y_pronombres_demostrativos.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_off00006311.bin
bbb097fda9f5e03563cd3c44bb977f41f631d07b416e76d8e44983e4d63f4e66
pdf-font-stream PDF embedded font (sfnt) at offset 0x6311 5236 bytes
font_01_sfnt_off000074b8.bin
d6eb8b95aaa629837ea95f1674a00d1aa0786875d2f91bd809f43b69070d043a
pdf-font-stream PDF embedded font (sfnt) at offset 0x74B8 14712 bytes