Malicious PDF — malware analysis report

Static analysis result for SHA-256 197b6f05fe6e26a7…

MALICIOUS

PDF

48.8 KB Created: 2020-08-27 13:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0eb7c271f4d46129750ac95fe828b5de SHA-1: 8ae6c47347810df50af85a97c1306780abd0c394 SHA-256: 197b6f05fe6e26a74201e6516f03158113177e01b83d054a7cb6b69ac9b54b98
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, also contains a URL pointing to the same malicious redirector. This suggests the primary goal is to lure users to malicious sites, likely for further exploitation or credential harvesting.

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.com/pify?keyword=ideias+da+banda+de+adora%25C3%25A7%25C3%25A3o+crist%25C3%25A3
    • http://dowusiv.momonthego2.com/uploads/1/3/2/7/132712415/tixozobefif.pdf
    • http://viwitev.desertskydoodles.com/uploads/1/3/1/0/131069934/lazus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6077/2516/files/57353187009.pdf
    • https://cdn.shopify.com/s/files/1/0429/3266/6524/files/chrome_e6_8f_92_e4_bb_b6.pdf
    • https://cdn.shopify.com/s/files/1/0432/5061/4429/files/information_value_credit_scoring.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fiwowosilikaragufes.pdf
    • https://cdn.shopify.com/s/files/1/0428/1335/8247/files/barreras_arancelarias_peru.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/speech_cue_card_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0428/9898/1030/files/curry_blake_new_man_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/2108/0475/files/74406010258.pdf
    • https://cdn.shopify.com/s/files/1/0453/9786/8712/files/lalitowalupud.pdf
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/tiwubovakomu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9644/8917/files/zofexeturuvi.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_off00007d27.bin
0ae0fa2132e8fee89987c9e72c9e73309b7687f6abcb77d39f7c98645d9acba2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D27 5480 bytes
font_01_sfnt_off00008ee2.bin
2961c1e0cf6c87529eaf96921cecae72f0683695ac2a5aee418c7b8d1533161e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE2 12636 bytes