Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b316c014360ad64…

MALICIOUS

PDF

41.7 KB Created: 2020-08-30 11:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6183346da52ecdb6a404b08b82d4618 SHA-1: fd1670ab34536d136020543503b7bac5a3445aa8 SHA-256: 3b316c014360ad64ae94c984d3399bef5a2e7cfaeb4f843a081e2562396a87a9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a guide book. The link at https://ttraff.cc/wix?keyword=kingdom+hearts+3+guide+book+english leads to known malicious infrastructure. The document also contains a large number of links to external PDFs, many of which are hosted on static.usrfiles.com, suggesting a link farm or SEO poisoning 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.cc/wix?keyword=kingdom+hearts+3+guide+book+english
    • https://static.usrfiles.com/ugd/868401_5deae305322b45ddbc483d0e9dec6325.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a5744a1b30e48a28ca4e771fb670019.pdf
    • https://static.usrfiles.com/ugd/b0b521_94364bafeea445dd99f0a2c24772abe1.pdf
    • https://cdn.shopify.com/s/files/1/0437/1306/9210/files/vocal_remover_pro_crack_apk.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/bmw_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/41602335331.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/bapiv.pdf
    • https://cdn.shopify.com/s/files/1/0458/6271/5545/files/74527091030.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/dragon_ball_the_complete_illustrations.pdf
    • https://static.usrfiles.com/ugd/b8c837_614dab093aae428c81c5799293fc0278.pdf
    • https://static.usrfiles.com/ugd/7f46b5_2db54319a361449382d042aba940197c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c21f3a9479542fc966c7fa7896050f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_90469ef81c544b36abbc2934d9dec548.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_off00006366.bin
593c07270943c8559a0530166c0394f890c39645e9c32658033808f07bec465d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6366 5576 bytes
font_01_sfnt_off00007623.bin
d6c61b6ed702e30a9a5f3b468cfa07edfdef826dbf7358d7b9990495c9887756
pdf-font-stream PDF embedded font (sfnt) at offset 0x7623 10364 bytes