Malicious PDF — malware analysis report

Static analysis result for SHA-256 a17293e0e5037ebd…

MALICIOUS

PDF

91.5 KB Created: 2020-08-02 09:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e14c33be338d2f2642049c86edee24e SHA-1: 921df6548e88682e6d4dfd7b20e1c7afdf09e2c5 SHA-256: a17293e0e5037ebd2636e704786133ad25a0632e3837a8d4e3811ce9839b9a85
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. The ML classifier also flagged this PDF with high confidence. The primary attack vector appears to be a social engineering lure to entice users to click the malicious link.

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=super+mario+bros+1
    • http://files.colescountyanimalshelter.org/uploads/1/3/0/9/130969298/6e78395.pdf
    • http://files.leslieslanguage.com/uploads/1/3/2/7/132740595/sexuviteru_wovilolewoz_sitelekoxiz.pdf
    • http://files.qsime.com/uploads/1/3/1/4/131437670/4769251.pdf
    • http://files.haleygarrett.com/uploads/1/3/1/8/131872178/5045211.pdf
    • https://cdn.shopify.com/s/files/1/0434/2631/6455/files/77102998711.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/dixanagesufero.pdf
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/74508805620.pdf
    • https://cdn.shopify.com/s/files/1/0432/9606/3652/files/95056543287.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/fefezemowapujitalixixa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/joxitomisoxureze.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/xupatalotikuliwuxowatojat.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/rigeji.pdf
    • https://cdn.shopify.com/s/files/1/0430/4096/4759/files/34244653434.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_off0001172c.bin
dd01f081210ef784f77c591e25badd43fd44368e1c4919275605d4a0beabd3db
pdf-font-stream PDF embedded font (sfnt) at offset 0x1172C 5512 bytes
font_01_sfnt_off00012a06.bin
7cf188d9196f59ccd39c27b69bdd015b26d8e92921d0ef4406b7852299a0f4fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A06 5228 bytes
font_02_sfnt_off00013bb0.bin
3000187f4f13bb3e6e4a8005e67e34041f46ac934a22689509974c132417e757
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB0 10876 bytes