Malicious PDF — malware analysis report

Static analysis result for SHA-256 02662884d80b46b7…

MALICIOUS

PDF

41.4 KB Created: 2020-08-10 14:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32a36b1651def94343cbb4daa5fdae51 SHA-1: 4cb65d046fbc6160017ebce6ab10c8817e5c8044 SHA-256: 02662884d80b46b7ae9189f8b3ceaba95cabf762e08251fafa7ab2e9e5e6871d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to "Ukulele chords pdf chart" and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of many external PDF links also indicates a link farm, likely for SEO manipulation or to host further malicious content.

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=ukulele+chords+pdf+chart
    • http://ragipos.chippewacohistory.org/uploads/1/3/1/6/131637016/b5a5d95cc66867b.pdf
    • http://files.bohojosboutique.com/uploads/1/3/0/9/130969809/jorekevoborina.pdf
    • http://jabesuxa.wewillcureals.com/uploads/1/3/1/0/131070450/mevoredusitaxuzi.pdf
    • http://files.stlukeschurchnewhaven.com/uploads/1/3/1/8/131871466/1441284.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2873/3352/files/cake_recipes_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0429/3197/8403/files/4544737459.pdf
    • https://cdn.shopify.com/s/files/1/0431/6499/1637/files/latina_sex_tapes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/telepizope.pdf
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/free_to_word_converter_download_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/3668/0098/files/dazapejodufagolis.pdf
    • https://cdn.shopify.com/s/files/1/0433/3636/8283/files/91605051170.pdf
    • https://cdn.shopify.com/s/files/1/0433/9384/3358/files/bolerilowiwaze.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3845/files/bandura_theory_of_learning.pdf
    • https://cdn.shopify.com/s/files/1/0431/9081/2821/files/sudijuluvibanikolamagi.pdf
    • https://cdn.shopify.com/s/files/1/0450/2175/7590/files/candle_in_the_wind_chords.pdf
    • https://cdn.shopify.com/s/files/1/0429/5000/0791/files/puxotowemufujavelim.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_off00006347.bin
8ed6e2bf8e90eb3c88bb314ed820b63b0af3af4538d26ea02457330b3bdd79dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6347 5300 bytes
font_01_sfnt_off00007548.bin
7bf15065b2977db22093e47a36728d49db022bbd8820964fa111df64c60ba449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7548 10416 bytes

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