Malicious PDF — malware analysis report

Static analysis result for SHA-256 272291015243c3fc…

MALICIOUS

PDF

49.3 KB Created: 2020-08-21 03:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5b20455f15fadca8b55fa92739cc9c6 SHA-1: d6681db80bdb273226dc904de055b78e52e3935e SHA-256: 272291015243c3fc9d44dd293020c676e3191918b684e363085c83a15381e363
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to redirect the user to this malicious site. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=how+to+find+the+bottleneck+in+informatica
    • http://files.donnylambeth.com/uploads/1/3/1/3/131380251/bopulet-xatunus.pdf
    • http://kabegafod.northvicgps.com/uploads/1/3/0/7/130740117/nuwuz.pdf
    • http://wesukitid.assric.org/uploads/1/3/1/0/131070867/4491323.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/electrocardiogramme_normal.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/naguzowafasojezepovo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4716/4840/files/megafagufupezudadigegipe.pdf
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/mutipi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/bojaninirunozi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/dedugor.pdf
    • https://cdn.shopify.com/s/files/1/0436/3167/3502/files/avanset_vce_crack.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/78636280682.pdf
    • https://cdn.shopify.com/s/files/1/0437/6041/8970/files/65046164408.pdf
    • https://cdn.shopify.com/s/files/1/0448/4605/5586/files/fronted_adverbs_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0592/6809/files/xakepamixosutavinewuken.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/st._augustine_confessions.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082ee.bin
e075779020b5d929ba89941dc6b1891a4ce0a040eae154a3b69897966e8676d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82EE 5340 bytes
font_01_sfnt_off000094f5.bin
5d33c484c8578821905642fa4d6aa3fe28315c4e79f1000ad6c4449e6833eb16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94F5 10352 bytes

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