Malicious PDF — malware analysis report

Static analysis result for SHA-256 e173534525a5e235…

MALICIOUS

PDF

40.2 KB Created: 2020-08-31 13:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1f1fcb58539389399203ff00909b712 SHA-1: 587d90178bb35d494043a57ee94eaa031b19da16 SHA-256: e173534525a5e235d75cf961eaf83129ddae153e10cfc1e53b82be2eb87e11ff
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a lure for a 'photoshop app'. The document also functions as a link farm, pointing to numerous other PDFs hosted on Shopify. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or scam attempt.

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=to+photoshop+app
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/kipodam.pdf
    • https://cdn.shopify.com/s/files/1/0464/2488/3352/files/killarney_provincial_park_fall_colour_report.pdf
    • https://cdn.shopify.com/s/files/1/0427/9861/2636/files/vilujomidaroruvobed.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/60910555685.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/ligimodit.pdf
    • https://cdn.shopify.com/s/files/1/0438/2251/4338/files/wordly_wise_book_7_lesson_4_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/41128240992.pdf
    • https://cdn.shopify.com/s/files/1/0450/8984/9509/files/o_meio_ambiente.pdf
    • https://cdn.shopify.com/s/files/1/0463/0698/4098/files/english_tenses_worksheets_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3041/files/kinosuzewo.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_323fc81b4e854cd5a333f363c07af502.pdf
    • https://static.usrfiles.com/ugd/34e21e_8436c1ae54844019be523ed32dc1fe58.pdf
    • https://static.usrfiles.com/ugd/74a852_5cec36b6d8d24285a89447bd9b5c45d7.pdf
    • https://static.usrfiles.com/ugd/9c0842_539422ce09144dff9f4a775951d8ae55.pdf
    • https://static.usrfiles.com/ugd/b8c837_8eb1866d71f94eedb18dda8893a49f48.pdf
    • https://static.usrfiles.com/ugd/b8c837_88e3500285b94696bd11af5ced4611ed.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_off00006192.bin
ecb54831c043f064d69b0e29e7b07fe6dcc64f0709d7f12c5d4a908249d07c07
pdf-font-stream PDF embedded font (sfnt) at offset 0x6192 4728 bytes
font_01_sfnt_off000071a2.bin
882906722ec8dd9dd1cdfbc956649ce68c370fcb6718f6622829540bc5ae8210
pdf-font-stream PDF embedded font (sfnt) at offset 0x71A2 10068 bytes