Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e26d78b2104d34…

MALICIOUS

PDF

45.7 KB Created: 2020-08-10 17:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 474c3da8527cdf820e8e852192bf9213 SHA-1: dcfd4df2a49725e2cc6d91ff3a4393816c45b11a SHA-256: 42e26d78b2104d346c1334acc1859eadae67d8827dc685ff15c004c516c1c5c0
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=all+formula+used+in+excel+pdf'. This URL is presented within the document body, disguised by text related to Excel formulas. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains, likely for obfuscation. The primary malicious intent appears to be redirecting the user to the malicious ttraff.ru domain.

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.ru/pify?keyword=all+formula+used+in+excel+pdf
    • http://files.jeffreybirdjr.com/uploads/1/3/2/6/132695554/jasitujo-bosoj-wasedaxewipi-navatonezas.pdf
    • http://files.amygregorio.com/uploads/1/3/0/9/130969332/tafawefojasokutuvan.pdf
    • http://files.megaiken.com/uploads/1/3/1/4/131438557/zolowojelitezox-majifufaserepes-nipogibat-mogadikas.pdf
    • https://cdn.shopify.com/s/files/1/0435/4467/4455/files/74876190540.pdf
    • https://cdn.shopify.com/s/files/1/0429/1480/7974/files/brief_calculus_and_its_applications.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3199/files/cardinal_and_ordinal_number_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/48759836770.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8167/files/fobakugadoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/81428207007.pdf
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/93121695754.pdf
    • https://cdn.shopify.com/s/files/1/0440/3966/7877/files/40101514258.pdf
    • https://cdn.shopify.com/s/files/1/0439/1842/6267/files/92597903654.pdf
    • https://cdn.shopify.com/s/files/1/0432/4655/1208/files/16059616188.pdf
    • https://cdn.shopify.com/s/files/1/0438/3395/0358/files/bsc_1st_year_physics_practical_book_download_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/72908099385.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_off00006860.bin
55ee353d7a023b3e5d6d896b348ea68361e58e8b79924905b65c0f8e3252dacc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6860 5160 bytes
font_01_sfnt_off000079cc.bin
a19d2cc840b641b80aa14223fd045a4813ad947526cc8f91c63b5ed2acafd14b
pdf-font-stream PDF embedded font (sfnt) at offset 0x79CC 9940 bytes
font_02_sfnt_off00009bdc.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BDC 4324 bytes