Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebb9956650c2300…

MALICIOUS

PDF

63.5 KB Created: 2020-08-25 03:06:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e714694b7f4b68027103c529bff7a0c6 SHA-1: 2f154332221449bae464897a7a44e7e90e055a51 SHA-256: 8ebb9956650c23006edfb2b701b396402d4df9ae86a6a422ce48de5addec4169
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical link pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. This suggests the PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware delivery. The ML classifier strongly supports the malicious verdict.

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=simple+non+circumvention+agreement+template
    • http://files.siusingallery.com/uploads/1/3/1/6/131637719/29c4b.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6549/files/employee_appraisal_report_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/9091/1137/files/how_to_install_windows_xp_on_virtualbox.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/adjectival_phrases_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/5893/6473/files/96756933261.pdf
    • https://cdn.shopify.com/s/files/1/0434/5767/5431/files/dell_2330dn_driver.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/rodidijatavoxovakuxus.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/narujavotekofiguvin.pdf
    • https://cdn.shopify.com/s/files/1/0434/2752/8871/files/staples_white_address_labels_template_5160.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/123022630.pdf
    • https://cdn.shopify.com/s/files/1/0431/5211/3820/files/bangla_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8456/files/bulubaseregegodopefasifig.pdf
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/australopithecus_boisei.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b360.bin
dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21
pdf-font-stream PDF embedded font (sfnt) at offset 0xB360 2828 bytes
font_01_sfnt_off0000bd5a.bin
a52ba30108113275374a7f66ff0662a8db0a32a4f4f3ecdd85112694fecef745
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5A 5240 bytes
font_02_sfnt_off0000cf11.bin
c5896c9b51dd12a6493e941bc1b2f80822125d1c7eb7838857ac719b8e37d533
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF11 9848 bytes