Malicious PDF — malware analysis report

Static analysis result for SHA-256 68cf64dd55e9f5c5…

MALICIOUS

PDF

52.5 KB Created: 2020-08-09 09:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8434265d3a4db300353bb7c63e7ce8aa SHA-1: ba55cf9baeabb663900ca614d4f0231fb8f03568 SHA-256: 68cf64dd55e9f5c5e33d504a6a84f24a35fea2c17f76cd806fb516ca5d8615b2
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=laporan+pendahuluan+atresia+ani+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into clicking it. The presence of multiple PDF links and a high ML classifier score further indicate malicious intent, likely for phishing or to download a second-stage payload.

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=laporan+pendahuluan+atresia+ani+pdf
    • http://files.therealestatestagingstudio.com/uploads/1/3/1/4/131407492/f9a287dd.pdf
    • http://files.reventnews.com/uploads/1/3/2/6/132681342/56a5cea76.pdf
    • http://files.francisdesignworks.com/uploads/1/3/1/0/131070993/warux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/2297/4117/files/nejogididon.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/69851866130.pdf
    • https://cdn.shopify.com/s/files/1/0434/3729/3718/files/72960435703.pdf
    • https://cdn.shopify.com/s/files/1/0430/8644/6746/files/asfixia_perinatal_causas.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/31757463322.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/raxokadetavuzalotutozin.pdf
    • https://cdn.shopify.com/s/files/1/0430/8356/3162/files/pathology_practical_book_harsh_mohan.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/79302196025.pdf
    • https://cdn.shopify.com/s/files/1/0433/2116/3941/files/rogue_warlock_multiclass.pdf
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/vakazewasatuwejon.pdf
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/24938510384.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_off00008144.bin
0adb4639cc0eb39edc652f8f03a8dfea928b3441f883c5189219df67ffee743b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8144 4952 bytes
font_01_sfnt_off00009205.bin
c5059d7cd4fc85703a41c419508f35c203f61c222803c40b983b42e222cfc374		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9205 10152 bytes
font_02_sfnt_off0000b4c8.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C8 4324 bytes

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