Malicious PDF — malware analysis report

Static analysis result for SHA-256 3847c6ba73d24b34…

MALICIOUS

PDF

44.6 KB Created: 2020-08-09 02:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc9c40b45afabd7b7d71332b6f86e678 SHA-1: 606b261109b81c1aace17cd09fc981fbdda70397 SHA-256: 3847c6ba73d24b349e81bf694fe023455c1a7846b9b5da897fbc5391b31ae4af
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains a URL that matches the redirector. This indicates a phishing or redirection attack designed to lead users to malicious sites.

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=bwv+543+pdf
    • http://kamoj.ottervisionuniversal.com/uploads/1/3/1/4/131483371/ab615a2d2899360.pdf
    • http://files.bonniejanedesign.com/uploads/1/3/0/8/130874284/4374740.pdf
    • http://files.hordlevoluntarycare.org/uploads/1/3/0/8/130874413/zoladamalija.pdf
    • http://files.vw-worldtraveladventures.com/uploads/1/3/0/8/130814984/3986249.pdf
    • http://files.ewbttu.org/uploads/1/3/1/0/131070711/jujomamikutew_guvate_dejupawo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/family_disease_model_of_addiction.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/can_openoffice_save_as.pdf
    • https://cdn.shopify.com/s/files/1/0437/8610/9086/files/pokifopuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1140/files/wixixafabamegoges.pdf
    • https://cdn.shopify.com/s/files/1/0438/3742/3776/files/learn_esp32_with_arduino_ide.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/joe_vitale_the_attractor_factor.pdf
    • https://cdn.shopify.com/s/files/1/0436/4982/6969/files/rococo_architecture_characteristics.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/46780829000.pdf
    • https://cdn.shopify.com/s/files/1/0431/1095/7210/files/31087877419.pdf
    • https://cdn.shopify.com/s/files/1/0430/2857/8467/files/gegakapesadujimexi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9227/1519/files/dedumejusazufugibepafizan.pdf
    • https://cdn.shopify.com/s/files/1/0440/1774/6070/files/xitiva.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_off000068ef.bin
66b29f3318b8eba1e85574946d9dc4555648c6dc0576ec6919f3bad4017b88ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x68EF 5096 bytes
font_01_sfnt_off00007a8d.bin
9e4c2fc69cb46553151e0a6a3ac28d9af6e8f9777f728abba5d2a7106fcbe432
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8D 13676 bytes