Malicious PDF — malware analysis report

Static analysis result for SHA-256 702dc03a60c703a4…

MALICIOUS

PDF

39.2 KB Created: 2020-08-21 00:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63956a673a7099a469400687acdf32ff SHA-1: 9e2dff0b53ed2234411242cc69f277bd5a233a1e SHA-256: 702dc03a60c703a445f9c9a81d406d296ea55cf32497d8fd62fe1257d4dd1fe4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to potentially malicious redirector infrastructure. The primary redirector URL is `https://ttraff.com/pify?keyword=germany+flag+colouring+sheet`, which is designed to obscure the final destination. The document body, though heavily obfuscated, contains this URL and other links, suggesting a lure to trick users into clicking through to malicious sites. The ML classifier also strongly indicated maliciousness.

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=germany+flag+colouring+sheet
    • http://nafajera.sunsetairporttransportation.com/uploads/1/3/0/7/130775795/fatugatozapam.pdf
    • http://jebodava.niloufarfarzam.com/uploads/1/3/0/7/130775734/lebijemovag.pdf
    • http://jiluwa.mustlovedogs2.com/uploads/1/3/0/8/130874359/7b277.pdf
    • http://files.whereintheworldiscaseykey.com/uploads/1/3/0/7/130738504/seloko-tomag-vajemisejinal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/kidopidalipujuxan.pdf
    • https://cdn.shopify.com/s/files/1/0431/5044/2660/files/barashada_salaada.pdf
    • https://cdn.shopify.com/s/files/1/0437/6412/1749/files/ansys_workbench_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5351/files/shiva_manasula_shakti.pdf
    • https://cdn.shopify.com/s/files/1/0435/7878/5951/files/dekirakuperipajatiwu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/basic_topology_armstrong_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/lao_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/31290084946.pdf
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/jolamubev.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bb1.bin
c974a303126b0bdf813097760804b15faecaa32f31217a9d79103fc77d67f395
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB1 5428 bytes
font_01_sfnt_off00006e09.bin
e27cd6846776f9632655aa711ab03a5a5949a38d02610cb26bf6c16d234621d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E09 9976 bytes