Malicious PDF — malware analysis report

Static analysis result for SHA-256 263e022bfe3f2494…

MALICIOUS

PDF

67.3 KB Created: 2020-08-06 07:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fa7c8bd2c46b0199a049777e4fdcebc SHA-1: 02e817b0249d70175a2034861d1262e75ff96dc0 SHA-256: 263e022bfe3f2494965aa5305d695b58b25a4cbfce7a2652d64cf511e0bd535e
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, and another indicated a link farm designed for SEO manipulation. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=aladdin+story+pdf', which is also flagged as a malicious redirector. This suggests the primary intent is to redirect users to malicious sites, likely for phishing or malware distribution.

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.ru/pify?keyword=aladdin+story+pdf
    • http://files.paulosibaja.com/uploads/1/3/1/1/131164555/zenapukako.pdf
    • http://files.baguiosoundsrental.com/uploads/1/3/0/7/130775856/jubafipasubaza-matizonenir.pdf
    • http://files.alternativeaccountabilityforum.org/uploads/1/3/2/6/132681508/folasi.pdf
    • https://cdn.shopify.com/s/files/1/0439/9765/9294/files/kowokoselidogegejekivafo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tijubijevuvikupox.pdf
    • https://cdn.shopify.com/s/files/1/0433/3725/3023/files/canon_mp160_ink.pdf
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/basic_life_support_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/10931415753.pdf
    • https://cdn.shopify.com/s/files/1/0434/5964/1496/files/nevipogudivasopet.pdf
    • https://cdn.shopify.com/s/files/1/0435/3543/3887/files/causas_del_acoso_psicologico.pdf
    • https://cdn.shopify.com/s/files/1/0438/2566/0066/files/tadorodez.pdf
    • https://cdn.shopify.com/s/files/1/0434/3198/5309/files/25711593610.pdf
    • https://cdn.shopify.com/s/files/1/0430/1094/9273/files/causes_of_autism_spectrum_disorder.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a2b8.bin
58a20f87bf5deac4c78abe4c52ee6d7502188211a6902cd014a2c7ebbe80d9d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2B8 3756 bytes
font_01_sfnt_off0000b01c.bin
eb00c8d181bbc46ebfdbf71c7f5ff7727539d409cb7e4b50d2cf75ec48616420		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB01C 5128 bytes
font_02_sfnt_off0000c1a7.bin
43b7c47fe04a0ee0f39efd38f6e55474d275f8f130e22854f9fdc224e027fd26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A7 11484 bytes
font_03_sfnt_off0000e88b.bin
3621ccfc8e5833b371b645a89afe3abac211b664877645a2192d3cc17e4ad458		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE88B 16772 bytes

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