Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ade120a1ea5da6…

MALICIOUS

PDF

44.7 KB Created: 2020-08-18 23:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 383639e35675fed87e45cbc8a7a4250e SHA-1: 0f051e18603c93c3caa3001ce836eb548e54e5cf SHA-256: 37ade120a1ea5da610f3b68dd571ff85c3a5f29bd93c442cb4db5cb6d71b5db8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document was flagged by a machine learning classifier and contains a significant number of embedded links, many of which lead to a redirector service. This suggests a phishing or malicious redirection attempt. The presence of a link to 'ttraff.cc' indicates a likely attempt to obscure the final malicious destination, potentially leading to malware download or credential harvesting. The document body contains garbled text but includes the suspicious URL.

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.cc/pify?keyword=metronome+apps+free+android
    • http://sipuwipiw.charmsandsparklebyria.com/uploads/1/3/2/6/132696147/1080238.pdf
    • http://futar.kickitsocialregistration.net/uploads/1/3/0/7/130776078/jasawunigofina-fogorilawamep.pdf
    • http://files.whitmancountypublichealth.org/uploads/1/3/0/7/130775434/fajire.pdf
    • http://files.alicerochecody.com/uploads/1/3/2/6/132681556/6666393.pdf
    • http://files.alicerochecody.com/uploads
    • https://cdn.shopify.com/s/files/1/0428/7958/2374/files/15821132438.pdf
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/marilogugupetedun.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7829/files/bujodoga.pdf
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/blender_2._79_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/9408/8611/files/phonics_sounds_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/6244/3683/files/tenovagu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0419/9075/files/gapabided.pdf
    • https://cdn.shopify.com/s/files/1/0429/1595/4847/files/pukerudexol.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/39035740003.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/tratamiento_del_asma_bronquial_en_adultos.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/kiran_s_bank_po_math_book.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_off0000719f.bin
8a6cb4cc5aa10e4eb0113d3beb23e2f97d0945b7058346dbbba5dd7a0af5cec7
pdf-font-stream PDF embedded font (sfnt) at offset 0x719F 5160 bytes
font_01_sfnt_off00008311.bin
7cb78f330ee87897d1c3aabd977c112c3713e2444cb9e719a795b2387c7b3862
pdf-font-stream PDF embedded font (sfnt) at offset 0x8311 10080 bytes