Malicious PDF — malware analysis report

Static analysis result for SHA-256 6119207a6a8562f2…

MALICIOUS

PDF

71.5 KB Created: 2020-08-21 19:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63d71c0e294e4d929adca615a195f666 SHA-1: 0384872f128667aaf4a8844d7890cdf65b1a13ef SHA-256: 6119207a6a8562f298e75c3a5d97349adffb6f77cd97b86978cb542cedc267c0
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL found in the heuristic. This suggests the PDF is designed to act as a link farm, potentially leading users to malicious content or phishing 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=modified+semi+block+letter+format+example
    • http://tononibif.momspantrykitchen.com/uploads/1/3/2/7/132740708/f850908a.pdf
    • http://files.flexcabling.dk/uploads/1/3/1/3/131378921/jubuduwavora-gisojoredaku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nedodakamilutejevojive.pdf
    • https://cdn.shopify.com/s/files/1/0435/3975/9255/files/square_to_round_duct.pdf
    • https://cdn.shopify.com/s/files/1/0432/3092/0871/files/airdrop_iphone_4s.pdf
    • https://cdn.shopify.com/s/files/1/0434/2317/0710/files/540_277_3172.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/tikkun_korim.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/jodapopobulabuvu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8104/files/zezifejamekobawidabi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/17972011499.pdf
    • https://cdn.shopify.com/s/files/1/0447/7861/9029/files/medical_biochemistry_questions.pdf
    • https://cdn.shopify.com/s/files/1/0434/0813/0213/files/half_elf_draconic_sorcerer.pdf
    • https://cdn.shopify.com/s/files/1/0441/2165/3400/files/65998533511.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/23378763802.pdf
    • https://cdn.shopify.com/s/files/1/0432/0650/8701/files/simajakagi.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_off0000d0a1.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A1 2828 bytes
font_01_sfnt_off0000da9b.bin
fe47949a3496327a7cd8099730fbc721a6f9a23bd0ecf0495b2c2729922b71d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9B 5580 bytes
font_02_sfnt_off0000ed87.bin
c6d443cfa1d0a308e0361765a6957fb7a0bf8a5087c740d3347bb3c0c9279589		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED87 10120 bytes

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