Malicious PDF — malware analysis report

Static analysis result for SHA-256 130c3f264e87d658…

MALICIOUS

PDF

50.2 KB Created: 2020-08-13 22:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c1ec36157f17af0f5f400bd536574c7 SHA-1: a4fa51e1dd3acb5a8a26119c84928145f51133f3 SHA-256: 130c3f264e87d658efcb06add885f06e437505457ed8d00b5d2f275079465b12
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link suggest an attempt to lure the user to a malicious site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=dhakad+chora+ki+video
    • http://gaxuwidaf.heartsinhandschool.com/uploads/1/3/0/7/130775432/4432786.pdf
    • http://files.chiavacci-cuisine.com/uploads/1/3/1/1/131164204/31929207ef0a.pdf
    • http://files.fortykes.net/uploads/1/3/1/4/131437953/rawuzijupi_mewejowaratu_dupodoxija_vigipub.pdf
    • http://files.tsipros.us/uploads/1/3/0/8/130874253/7812265.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0434/2523/5111/files/wimilifumagaditakol.pdf
    • https://cdn.shopify.com/s/files/1/0430/0544/4259/files/cervical_cancer_screening_ontario.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1029/files/careers_in_physics_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/juwupogazemuteka.pdf
    • https://cdn.shopify.com/s/files/1/0435/5050/7167/files/molojeburijorozidisanoku.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7313/files/sekafobugokik.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/vovajigimumakiveg.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/cantaloupe_island_tenor_sax.pdf
    • https://cdn.shopify.com/s/files/1/0440/6630/8246/files/87666587491.pdf
    • https://cdn.shopify.com/s/files/1/0431/0525/5577/files/luzilibuwodomuwube.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005013.bin
03fe1716f38ac43c895e2ade711af6181f89ea150dcac1d619588229bc970a85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5013 4540 bytes
font_01_sfnt_off00005f89.bin
316f78c6e162999e43ccb83d429ef85c46045bf1ac59c77d169faf589ecd4eba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F89 2116 bytes
font_02_sfnt_off00006933.bin
32078fe692ad1a8e9bae63209753f34ab784052314b19ce0c17f6dbbac8f8690		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6933 13648 bytes
font_03_sfnt_off000093da.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93DA 4324 bytes
font_04_sfnt_off0000a1db.bin
fc765494a57e71404de14069e4b2da5eb4129bb7fa1fdb8523693a770e6301c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1DB 7412 bytes

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