Malicious PDF — malware analysis report

Static analysis result for SHA-256 648031fdbde2e9e5…

MALICIOUS

PDF

44.8 KB Created: 2020-08-12 14:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6371f94de29e4bef2ed6bab21e8997e2 SHA-1: 74547968c6f0ba6c6ac9e467b970fb8d608281b1 SHA-256: 648031fdbde2e9e538ad9ba3b1880a2469a5c93b44a3930ba5b092d74c3193b0
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and contains links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm, suggesting an attempt to manipulate search engine results or direct users to malicious sites. The presence of embedded URLs and the overall structure indicate a likely attempt to deliver a malicious payload or phish for information.

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.ru/pify?keyword=building+design+and+civil+engineering+drawing+pdf
    • http://files.hobbytimerc.com/uploads/1/3/1/3/131380183/filukoluwewoj-biganozesajaxu-lokigubolijewa.pdf
    • http://files.howtobeagreatprincipal.com/uploads/1/3/1/0/131070178/327109.pdf
    • http://files.bcdancepassion.com/uploads/1/3/1/4/131438629/c97fd10ea3.pdf
    • http://files.bnsathletics.ca/uploads/1/3/1/1/131164081/ralororij_sileloxaxuzi_vivovewelovav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/31384707365.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1259/files/3780759590.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0579/files/71946628137.pdf
    • https://cdn.shopify.com/s/files/1/0432/4904/1563/files/nosizegave.pdf
    • https://cdn.shopify.com/s/files/1/0436/1990/9794/files/encyclopedia_of_computer_science_ralston.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/97232563730.pdf
    • https://cdn.shopify.com/s/files/1/0433/1841/1417/files/gasotibalegixinilavawus.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/1302092800.pdf
    • https://cdn.shopify.com/s/files/1/0432/6273/8592/files/simple_random_sampling_advantages_and_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0440/0830/8886/files/canon_ae1_program_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5815/9006/files/faromomososeluxazuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4551/files/literatur_der_aufklrung.pdf
    • https://cdn.shopify.com/s/files/1/0429/2925/8649/files/gomaseluwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/52196121442.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000646f.bin
116c7350ebe633cd266e882e45853a3af37c307a1ac8621654b0df4f09d29c4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x646F 5216 bytes
font_01_sfnt_off00007645.bin
48abe4aadede418c406dd489a6694c04088379990577cb5b04a00a8d71547859		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7645 9868 bytes
font_02_sfnt_off000097bd.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97BD 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.