Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce6c3d3cde82452…

MALICIOUS

PDF

68.3 KB Created: 2020-08-10 03:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ac2b72b600239e801c1e2efda001fcd SHA-1: 537dd2e2f0fe5f8e53c4f16ca6bf806f61bd662c SHA-256: 6ce6c3d3cde824526966858e2e16ed90500cedf9d214f655afff5444da56b4d5
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text suggesting a lure for downloading a PDF, which aligns with the malicious redirector. The ML classifier also strongly indicated maliciousness.

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=bharathiyar+kavithai+download+pdf
    • http://vexewo.mandscigars.com/uploads/1/3/1/0/131070859/0abe5af.pdf
    • http://files.tantricshadowcoaching.com/uploads/1/3/1/4/131437750/f49ae28.pdf
    • http://files.changingfutures.org.uk/uploads/1/3/0/7/130775529/6b768.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/5286/6467/files/staff_performance_appraisal_sample.pdf
    • https://cdn.shopify.com/s/files/1/0440/1466/5878/files/jewilogapupafugobup.pdf
    • https://cdn.shopify.com/s/files/1/0429/7683/7785/files/74516633708.pdf
    • https://cdn.shopify.com/s/files/1/0437/1644/4311/files/13406038400.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8011835234.pdf
    • https://cdn.shopify.com/s/files/1/0433/2693/1099/files/bahama_bucks_menu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2135/1587/files/fajorifigejumoxokoludoga.pdf
    • https://cdn.shopify.com/s/files/1/0428/2987/3318/files/38832962.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7134/files/clinical_nutrition_and_dietetics_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/kamevuzusevipuzuboj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0767/files/17982094781.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000092a0.bin
7137e1e98be01d9135c585c8d96a0343bcf78323fda7f8c953f1e4c88450ad00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92A0 4988 bytes
font_01_sfnt_off0000a3a0.bin
d6e6ac2a357b48e2de5032662b1a5648a36c73c8fe27a3c2ffd841f99dc88de9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3A0 13628 bytes
font_02_sfnt_off0000c49a.bin
3ae626465647d3cd971c2890591e78ab2f7ff02cbea156909d9a81287303f12a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC49A 15068 bytes
font_03_sfnt_off0000f3b5.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B5 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.