Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9b5830489b2b1a…

MALICIOUS

PDF

41.6 KB Created: 2020-08-21 16:39:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b65c76a6519ec9252f0b598c7a52a11 SHA-1: a6696e90ba4604c7c81b1050a5baa957a47048dd SHA-256: fb9b5830489b2b1a641c6ec953df6e4686c31edf74ba3228661e4a28e9e9c28b
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many hosted on Shopify, designed to appear as legitimate documents but ultimately leading to a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Blade and Soul launcher 2' and a URL pointing to a redirector, suggesting a lure for users seeking game-related content. The primary malicious link is https://ttraff.cc/pify?keyword=blade+and+soul+launcher+2, which is likely used to funnel victims to further malicious sites.

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/pify?keyword=blade+and+soul+launcher+2
    • http://files.jyfit.com/uploads/1/3/1/0/131070317/c6a537cc809a5ec.pdf
    • http://files.artaffairmaui.com/uploads/1/3/1/6/131606016/702df2c871837.pdf
    • http://files.soilandforestryservices.com/uploads/1/3/1/3/131384401/viron-rexenovisonetu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/tuxewazewiwevo.pdf
    • https://cdn.shopify.com/s/files/1/0439/4788/4699/files/tactics_for_listening_oxford.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54171278856.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/80401822707.pdf
    • https://cdn.shopify.com/s/files/1/0435/1619/9066/files/pabipug.pdf
    • https://cdn.shopify.com/s/files/1/0447/9696/9109/files/bryant_plus_80_furnace_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/39351202521.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/51413198244.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1315/files/pifetasusikekebul.pdf
    • https://cdn.shopify.com/s/files/1/0437/0916/9815/files/vukafuwixegojawapuna.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6421/files/nurebojusowixijesanovopel.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_off0000626a.bin
fbc12854703736afc8671527fbe6fc119276956ea58c27eef1a0703e202b1cdd
pdf-font-stream PDF embedded font (sfnt) at offset 0x626A 5208 bytes
font_01_sfnt_off0000740e.bin
95afb001118313cb63b3df7de627629b2a5d532eb13aef77878be3364a14562b
pdf-font-stream PDF embedded font (sfnt) at offset 0x740E 11676 bytes