Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ee2e939e35debe…

MALICIOUS

PDF

50.4 KB Created: 2020-08-25 16:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b0c55edfdc15c0ae2a923aec0c04172 SHA-1: 829c039f8e6b1897b088a91f72e209b87a45de09 SHA-256: 04ee2e939e35debe4bf285050101165366d1f620088177e307b5758a9cfd9556
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains the malicious URL. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

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=heart+shaped+box+bass+tab+pdf
    • http://files.azitopaving.com/uploads/1/3/0/8/130815437/8413439.pdf
    • http://gugevimit.dedosdoamerica.com/uploads/1/3/0/8/130813306/gagabag_tikufulad_wukubamavofur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/medical_surgical_nursing_ignatavicius.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/pamesapapa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/61386647373.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/mebetotukexejika.pdf
    • https://cdn.shopify.com/s/files/1/0432/9242/6405/files/apc_smart_ups_3000_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/55790955296.pdf
    • https://cdn.shopify.com/s/files/1/0438/2821/5968/files/atharva_veda_complete.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/multiply_strings_java.pdf
    • https://cdn.shopify.com/s/files/1/0428/6906/3836/files/37402443663.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5250/files/74898647958.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/loxof.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b75.bin
bbecf777a4cc2ee08a534b137dec9e695987e053232ba45a8fa8165f76b8a07f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B75 4900 bytes
font_01_sfnt_off00007c28.bin
67e14026e37eb19d5d6ff56cc875543d517863003a86cda8886a79685572f530		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C28 15556 bytes
font_02_sfnt_off0000ac7b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC7B 4324 bytes

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