Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f40569acfc5aa5…

MALICIOUS

PDF

43.5 KB Created: 2020-08-14 11:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a961d838069ece4c378d52932b40592a SHA-1: b1b611f7612721bf6e47d7eab178f9df538795d0 SHA-256: 57f40569acfc5aa5bfb26afd6981fcf2931d13067044f9075fd2c93e5386e650
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. This suggests a link farm or SEO poisoning attack designed to drive traffic to malicious infrastructure. The document body contains obfuscated text and the primary malicious URL, indicating the intent is to redirect users to potentially harmful content.

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.cc/wb?keyword=sindrome%20siringomielia%20pdf
    • http://ruvifi.emanuelaaureli.com/uploads/1/3/1/4/131437792/zedaxig.pdf
    • http://files.tycymorth.org.uk/uploads/1/3/1/6/131606630/ketedef.pdf
    • http://files.kauaicleaningdoneright.com/uploads/1/3/1/3/131380175/608e942.pdf
    • http://files.eastonscoaches.co.uk/uploads/1/3/1/4/131410952/gizodisavugotik.pdf
    • http://files.rathfrilandmotorclub.co.uk/uploads/1/3/2/3/132302913/zomawuzivoludi_petusol_mufawukemur_xitedelufukojob.pdf
    • https://cdn.shopify.com/s/files/1/0435/4569/0266/files/67969928346.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/characteristics_of_service_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0447/3297/3205/files/muslim_baby_names_with_meaning_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1805/8901/files/nofetisegevuge.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/buffalo_wings_and_rings_application.pdf
    • https://cdn.shopify.com/s/files/1/0429/6173/1743/files/zuwasanapaletumetij.pdf
    • https://cdn.shopify.com/s/files/1/0433/8860/0478/files/zojenituritarin.pdf
    • https://cdn.shopify.com/s/files/1/0437/7355/8935/files/argan_arte_moderno.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42539854631.pdf
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/composite_material_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/0982/7231/files/pamobofukiforagemase.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9670/files/test_for_ketone_bodies_in_urine.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0730/files/wupilovodefuxika.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_off00006a8e.bin
88817294c7b49883f9d0987bc1576ed4ccb3f28cc34936aa6ca90716c88ffdd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8E 5464 bytes
font_01_sfnt_off00007d02.bin
daf59f389a13a206d3ad550743da80e417afb2baf2729a8427c56d29c0bdbf1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D02 10692 bytes