Malicious PDF — malware analysis report

Static analysis result for SHA-256 a269c508f100753a…

MALICIOUS

PDF

54.8 KB Created: 2020-08-27 13:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9b7e4047e875615e8e05f5021b11d05 SHA-1: 416d8a7be6b790b70db55ba9edcd33b93f25ccb3 SHA-256: a269c508f100753a0e4e6367a223d50ac073a6aeaa6aec85094d34ec2a3f213c
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link to 'ttraff.com' and a large number of links to other PDFs hosted on Shopify, indicating a link farm likely used for SEO manipulation or to distribute further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=lego+island+2+gba
    • http://files.rockymountainadventureseries.com/uploads/1/3/1/4/131437615/9632802.pdf
    • http://navudu.tessyspopcorndelights.com/uploads/1/3/0/8/130814297/dcb15.pdf
    • http://bavatur.mentalhealtheducators.org/uploads/1/3/1/3/131383483/mozadijejuse.pdf
    • http://files.crawlspacespecialists.com/uploads/1/3/1/4/131405977/jelexi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/sibotegopepilepifopupe.pdf
    • https://cdn.shopify.com/s/files/1/0463/0917/9554/files/openssl_centos_6_rpm.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/zavafogena.pdf
    • https://cdn.shopify.com/s/files/1/0437/3299/2161/files/kowarijobuxusaweka.pdf
    • https://cdn.shopify.com/s/files/1/0441/0333/6088/files/19941534234.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6285/files/nugajotifixuzovufupad.pdf
    • https://cdn.shopify.com/s/files/1/0429/1330/0647/files/sezuwezew.pdf
    • https://cdn.shopify.com/s/files/1/0437/5989/4689/files/sirawejaluborulofimiwafi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8759/2608/files/46851417144.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_off00008d55.bin
89f1201eac618b39815651b08122fc6ea0d8caeb1dcf9991ba384a1237c771f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D55 4820 bytes
font_01_sfnt_off00009dba.bin
f2d65dad73903004e73d451ef85e07ac8032baf3c74c3208acebc73f9397eb65
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DBA 10240 bytes
font_02_sfnt_off0000c0be.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BE 4324 bytes