Malicious PDF — malware analysis report

Static analysis result for SHA-256 3abbe05da5d38140…

MALICIOUS

PDF

49.8 KB Created: 2020-08-08 03:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbdf51bcafa12bc4e1bf4d53bd29ee9c SHA-1: f1d2d294f7b4fbd974bc9d23673034586a9a1dda SHA-256: 3abbe05da5d381405c0a9b1e90cf626afbe0e6f4d1a640c2182c347249d41f94
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. This indicates a likely phishing or malware distribution attempt, disguised as a technical document. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence for the attack pattern.

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=applied+mathematics+for+electrical+engineers+notes+pdf
    • http://files.exploretransform.com/uploads/1/3/1/4/131483184/4074219.pdf
    • http://files.buenavistatradingpost.com/uploads/1/3/0/7/130775701/sebedobibuxomak.pdf
    • http://files.theworldofmcewan.com/uploads/1/3/0/7/130738814/gibaja_tawix_wododibura_musimetal.pdf
    • http://lolinus.garyseast.com/uploads/1/3/1/4/131406082/691029.pdf
    • https://cdn.shopify.com/s/files/1/0431/3835/1255/files/rojipimabibo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/github_md_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/9799/6960/files/pairing_aba.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/56078697521.pdf
    • https://cdn.shopify.com/s/files/1/0434/5852/7397/files/metal_forming_process_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0428/4180/0860/files/74734049693.pdf
    • https://cdn.shopify.com/s/files/1/0434/5203/9324/files/que_es_un_acta_constitutiva_de_una_empresa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/43449920661.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/salosivag.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8359/files/92990313081.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8913/files/bomiduriv.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ee5.bin
9d98f8ea2c12da9df3e65465cb233212073f54385990702444e9b342d188cd8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE5 5344 bytes
font_01_sfnt_off000070da.bin
49f1c345582212729590e0456707ca92d3838aef8cba26fbcaa28f8c5b0a0640		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70DA 2116 bytes
font_02_sfnt_off00007aa5.bin
135af801d725f8a666d261809e87e40d9c0e1596b0668785da0d96d28c70c11f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA5 14992 bytes
font_03_sfnt_off0000a93f.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA93F 4324 bytes

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