Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49f065b7ece3ba1…

MALICIOUS

PDF

76.9 KB Created: 2020-08-11 14:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22e8136d334e9cdb3080ef645728af9a SHA-1: 36921d92fc4c3ace40f42a7d1679ba74552939b5 SHA-256: d49f065b7ece3ba1fa7add6122961748e9d1dff346de0fb15d2f47e32726e623
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary malicious redirector URL identified as https://ttraff.cc/pify?keyword=psychological+theories+of+values+development+pdf. This URL is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. 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.cc/pify?keyword=psychological+theories+of+values+development+pdf
    • http://files.the-clipboard.com/uploads/1/3/0/7/130776602/f298e.pdf
    • http://files.aloenottingham.com/uploads/1/3/1/6/131637168/murulalirovotefexise.pdf
    • http://files.alannaandaliciaegan.com/uploads/1/3/1/4/131438240/f5816ee490.pdf
    • http://files.thedigestivehealthclinic.com/uploads/1/3/0/9/130969254/nujuwiduxibiwozeveni.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/fodikidomagabowakowavi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/muvorebesakus.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/sitazegig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jivanup.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/54677168950.pdf
    • https://cdn.shopify.com/s/files/1/0454/5613/0200/files/ain_t_it_fun_guns_n_roses_tab.pdf
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/nopufifinazufogetilepub.pdf
    • https://cdn.shopify.com/s/files/1/0437/6425/2823/files/avn_ayurveda_products_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/4474/1024/files/finekelimeliw.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/8002836056.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_off0000e6c0.bin
48ab59ef0b636ef627be5a15f8218c179d4bf4bc8d6584ad97e82843d2a4150f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C0 5732 bytes
font_01_sfnt_off0000fa21.bin
c1394dd0ff7aa245f11097999083bc2ce7c23034001741aaf95229cbb56e0621
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA21 14308 bytes