Malicious PDF — malware analysis report

Static analysis result for SHA-256 834111a5f54b620b…

MALICIOUS

PDF

42.3 KB Created: 2020-08-31 04:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b883fd4aeec0a5dd3e2eef3302c33208 SHA-1: df843b783f6f14f29184f4dfc5100f99e3ed637f SHA-256: 834111a5f54b620bbd5e77fa9fd0ee2bc4552d8013510a39533bb44f35098e7a
150 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'Honda goldwing gl1500 repair manual', and the PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, likely for SEO manipulation or to distribute further malicious content. The ML_NYX_PDF_MALICIOUS heuristic strongly supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=honda+goldwing+gl1500+repair+manual
    • https://cdn.shopify.com/s/files/1/0437/6975/7850/files/15344005624.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/35151229819.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/runogaxaroxes.pdf
    • https://static.usrfiles.com/ugd/b8c837_da2133d936164a218f79a8d2f4a3d882.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/42788518697.pdf
    • https://cdn.shopify.com/s/files/1/0462/7221/7237/files/misovugutelipefu.pdf
    • https://cdn.shopify.com/s/files/1/0450/2857/3334/files/ser_bachiller_enero_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53295895336.pdf
    • https://cdn.shopify.com/s/files/1/0435/7973/6223/files/35182405516.pdf
    • https://cdn.shopify.com/s/files/1/0432/4360/2080/files/american_english_file_4_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/life_inthe_fast_lane_ecg.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9459/files/23003365244.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_off00005ca0.bin
49dafd695a2a11e7979ccbf4969c3518519b0f1f7928143c704549b2ab6b25e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA0 5472 bytes
font_01_sfnt_off00006f3b.bin
b9efaf6f58d67b26ab832b3a757e7b4b9ce9ff74ad4bc35a258ff1376a9a6d72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3B 14496 bytes

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