Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8abcee892bdeef7…

MALICIOUS

PDF

46.1 KB Created: 2020-08-19 12:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d7eac3432d57669ce0ae0c30abf207a SHA-1: 3ab9b9202be0fb200488cd88fa5801304a309ba9 SHA-256: b8abcee892bdeef7f327a4562e368c1b52ae007225772ce692d75133206d9848
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Boldbeast call recorder pro free' and a URL that matches the malicious redirector. This suggests a social engineering lure to trick users into downloading potentially malicious software or visiting further compromised sites. No scripts were extracted from this sample.

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.cc/pify?keyword=boldbeast+call+recorder+pro+free
    • http://jisabutub.clickcarton.com/uploads/1/3/2/6/132695356/6339527.pdf
    • http://vedaw.offspring-design.com/uploads/1/3/0/7/130775971/kivuvelonab.pdf
    • http://fafome.johnquah.com/uploads/1/3/0/7/130776485/1675374.pdf
    • http://wokes.thegenerationloveproject.com/uploads/1/3/0/8/130813528/33fa8275163f.pdf
    • http://files.megjordanart.com/uploads/1/3/1/0/131069839/xekobo-rijesurosizo-xajorufaraka.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3351/files/74415702770.pdf
    • https://cdn.shopify.com/s/files/1/0432/7299/4979/files/wefawagonujoba.pdf
    • https://cdn.shopify.com/s/files/1/0430/7864/7957/files/cardiologia_pediatrica_diaz_gongora.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8074/files/soduxumulodowuku.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/kujitoguwasaxutoruganumi.pdf
    • https://cdn.shopify.com/s/files/1/0439/5145/6411/files/kotaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/bacteriuria_asintomatica_en_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0448/0519/3885/files/panasonic_bread_maker_recipe_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/wattpad_english_stories_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/57193809634.pdf
    • https://cdn.shopify.com/s/files/1/0434/5679/0695/files/32050147817.pdf
    • https://cdn.shopify.com/s/files/1/0430/7707/5108/files/lipukizujuwexuvolijapu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8049/9879/files/emotions_exercises_elementary.pdf
    • https://cdn.shopify.com/s/files/1/0447/8235/4589/files/buwalegevagarebizaz.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_off00006af2.bin
09a212f05351d67f0eadaec0c767ea17d031139099616728179879cded8befd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF2 5336 bytes
font_01_sfnt_off00007d1e.bin
dcea1298bc7ba2b0dfe2541d599d5279b6891bf83044ecfcd423a4f67f41efa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1E 14884 bytes

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