Malicious PDF — malware analysis report

Static analysis result for SHA-256 1513dd4cbd783a5e…

MALICIOUS

PDF

39.9 KB Created: 2020-09-19 01:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a92d3a19e55a0ed8fd705ed1133a68e4 SHA-1: f8ae9fb7b6397d481412a63ddc67284370389fdb SHA-256: 1513dd4cbd783a5e45f36449c8b47aa81e0ee5e2517eb478e39ee1d78665c20d
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.link/wix?keyword=manual+showbox+sat+hd+plus'. It also exhibits a link farm behavior, embedding numerous external PDF links, many of which are hosted on Shopify. The presence of a 'download button' lure further supports a phishing or scam attempt. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/wix?keyword=manual+showbox+sat+hd+plus
    • http://kibon.svrcflyers.com/uploads/1/3/1/8/131858540/balemiwasusokal-bokenizo-jovur-kepoxojaxusotu.pdf
    • http://files.upwardspiralcc.com/uploads/1/3/2/8/132815063/sisegiwerunapogog.pdf
    • http://files.colecountygenealogy.com/uploads/1/3/0/7/130739059/7037789.pdf
    • http://files.suzusakai.com/uploads/1/3/0/7/130738841/palumirutew-jifoxubuzaki-suvaxevoton-padok.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0451/3444/6746/files/sudox.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/multivariate_normal_distribution_scipy.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/diabetic_dyslipidemia.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/mechanical_aptitude_test_questions_and_answers_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7064/files/acknowledgment_of_paternity_texas.pdf
    • https://04b19026-4ff3-45a1-9941-ded46a5f954c.filesusr.com/ugd/ef0078_bc8435895f2249bf9f9d7fc3d84c6498.pdf?index=true
    • https://a90d22b3-97e3-46d2-8b7b-37f04d34451c.filesusr.com/ugd/592671_13dae973319449eeb1fbf7774240243c.pdf?index=true
    • 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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c11.bin
b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C11 6744 bytes
font_01_sfnt_off00005cf6.bin
168b5c26b69322f1ebc4bc8eb4d892c199604ffe054b6286adc399b92ecfbb0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF6 5256 bytes
font_02_sfnt_off00006ef1.bin
b52600a3f73ccc1c693dd6a70253b889af554e378ddc8243a23beb23ecc03637
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF1 10540 bytes